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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q

X	QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2004.

OR

TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from ________________ to _______________

Commission File Number 1-475

A.O. SMITH CORPORATION

Delaware	39-0619790
(State of Incorporation)	(IRS Employer ID Number)

P.O. Box 245008, Milwaukee, Wisconsin 53224-9508
Telephone: (414) 359-4000

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months and (2) has been subject to such filing requirements for the past 90 days. Yes X No ___

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Act) Yes X No ___

Class A Common Stock Outstanding as of September 30, 2004 -- 8,491,906 shares

Common Stock Outstanding as of September 30, 2004 -- 20,995,654 shares

Exhibit Index Page 16

Index

A. O. Smith Corporation

Part I. Financial Information
Item 1. Financial Statements (Unaudited)
Condensed Consolidated Statements of Earnings
- Three and nine months ended September 30, 2004 and 2003	3
Condensed Consolidated Balance Sheets
- September 30, 2004 and December 31, 2003	4
Condensed Consolidated Statements of Cash Flows
- Nine months ended September 30, 2004 and 2003	5
Notes to Condensed Consolidated Financial Statements
- September 30, 2004	6-9
Item 2. Management's Discussion and Analysis of Financial Condition
and Results of Operations	10-13
Item 3. Quantitative and Qualitative Disclosure of Market Risk	13
Item 4. Controls and Procedures	13
Part II. Other Information
Item 1. Legal Proceedings	14
Item 4. Submission of Matters to a Vote of Security Holders	14
Item 5. Other Information	14
Item 6. Exhibits and Reports on Form 8-K	14
Signatures	15
Index to Exhibits	16

PART I--FINANCIAL INFORMATION

ITEM 1--FINANCIAL STATEMENTS

A.O. SMITH CORPORATION
CONDENSED CONSOLIDATED STATEMENT OF EARNINGS
Three and Nine Months ended September 30, 2004 and 2003
(dollars in millions, except for per share data)
(unaudited)

	Three Months Ended September 30					Nine Months Ended September 30
	2004			2003		2004		2003
Electrical Products	$	215.9		$	201.2	$	667.1	$	641.9
Water Systems		174.0			155.2		576.6		520.0

Net sales		389.9			356.4		1,243.7		1,161.9
Cost of products sold		327.9			294.9		1,015.1		938.4

Gross profit		62.0			61.5		228.6		223.5
Selling, general and administrative expenses		57.4			48.8		175.0		154.5
Interest expense		3.3			3.1		9.6		9.0
Other expense - net		0.4			0.3		0.9		0.6

		0.9			9.3		43.1		59.4
(Credit) provision for income taxes		(2.1	)		3.3		12.1		19.8

Net Earnings	$	3.0		$	6.0	$	31.0	$	39.6

Earnings per Common Share
Basic	$	0.10		$	0.21	$	1.06	$	1.36

Diluted	$	0.10		$	0.20	$	1.04	$	1.33

Dividends per Common Share	$	0.16		$	0.15	$	0.46	$	0.43

See accompanying notes to unaudited condensed consolidated financial statements.

A.O. SMITH CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
September 30, 2004 and December 31, 2003
(dollars in millions)

	(unaudited) September 30, 2004			December 31, 2003
Assets
Current Assets
Cash and cash equivalents	$	21.8		$	18.7
Receivables		273.0			236.7
Inventories		261.6			247.0
Deferred income taxes		12.6			14.3
Other current assets		28.2			31.0

Total Current Assets		597.2			547.7
Property, plant and equipment		743.0			718.9
Less accumulated depreciation		395.8			360.2

Net property, plant and equipment		347.2			358.7
Goodwill		303.8			303.8
Other intangibles		7.8			7.1
Other assets		64.9			62.6

Total Assets	$	1,320.9		$	1,279.9

Liabilities
Current Liabilities
Notes payable	$	--		$	96.8
Trade payables		148.2			144.5
Accrued payroll and benefits		33.7			30.5
Accrued liabilities		35.5			37.7
Product warranty		17.7			18.9
Income taxes		0.3			1.6
Long-term debt due within one year		8.6			8.6

Total Current Liabilities		244.0			338.6
Long-term debt		286.4			170.1
Pension liability		57.0			61.6
Other liabilities		102.4			105.5
Deferred income taxes		32.8			27.9

Total Liabilities		722.6			703.7
Stockholders' Equity
Class A common stock, $5 par value: authorized
14,000,000 shares; issued 8,524,501		42.6			42.7
Common stock, $1 par value: authorized 60,000,000
shares; issued 24,024,861		24.0			24.0
Capital in excess of par value		72.8			73.9
Retained earnings		641.5			623.9
Accumulated other comprehensive loss		(98.0	)		(97.2	)
Treasury stock at cost		(84.6	)		(91.1	)

Total Stockholders' Equity		598.3			576.2

Total Liabilities and Stockholders' Equity	$	1,320.9		$	1,279.9

See accompanying notes to unaudited condensed consolidated financial statements

A.O. SMITH CORPORATION
CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS
Nine Months Ended September 30, 2004 and 2003
(dollars in millions)
(unaudited)

	Nine Months Ended September 30
	2004			2003
Operating Activities
Net earnings	$	31.0		$	39.6
Adjustments to reconcile net earnings to net cash provided
by operating activities:
Depreciation		37.9			37.1
Amortization		2.1			1.6
Net change in current assets and liabilities		(43.2	)		(49.0	)
Net change in other noncurrent assets and liabilities		(2.7	)		(2.5	)

Other		1.0			(0.7	)
Cash Provided by Operating Activities		26.1			26.1
Investing Activities
Capital expenditures		(29.5	)		(28.1	)
Acquisition of business		(2.3	)		(3.1	)

Cash Used in Investing Activities		(31.8	)		(31.2	)
Financing Activities
Short-term debt retired - net		--			(27.1	)
Long-term debt incurred		21.7			50.0
Long-term debt retired		(2.1	)		(5.2	)
Other stock transactions		3.0			2.6
Dividends paid		(13.5	)		(12.5	)

Cash Provided by Financing Activities		9.1			7.8
Cash Used in Discontinued Operations		(0.3	)		(0.1	)

Net increase in cash and cash equivalents		3.1			2.6
Cash and cash equivalents-beginning of period		18.7			32.8

Cash and Cash Equivalents - End of Period	$	21.8		$	35.4

See accompanying notes to unaudited condensed consolidated financial statements.

A. O. SMITH CORPORATION
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2004
(unaudited)

1.	Basis of Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission. Accordingly, they do not include all of the information and footnotes required for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three- and nine-month periods ended September 30, 2004 are not necessarily indicative of the results expected for the full year. It is suggested that the accompanying condensed consolidated financial statements be read in conjunction with the audited consolidated financial statements and the notes thereto included in the company’s latest Annual Report on Form 10-K. Certain prior year amounts have been reclassified to conform to the 2004 presentation.

2.	Acquisitions

In November 2003, the company acquired certain net assets of Taicang Special Motor Co., Ltd. (Taicang), a manufacturer of commercial hermetic electrical motors located in Suzhou, Jiangsu Province, China. The total cost of the acquisition was $4.0 million including a payment of $2.3 million made in April 2004. This cost exceeded the fair value of the net assets acquired by $0.4 million which was recorded as goodwill in the Electrical Products segment.

3.	Inventories (dollars in millions)

	September 30, 2004		December 31, 2003
Finished products	$	163.2	$	153.8
Work in process		45.8		48.2

Raw materials		78.3		70.8
		287.3		272.8
LIFO reserve		25.7		25.8

	$	261.6	$	247.0

4.	Long-Term Debt

The company’s credit agreement and term notes contain certain conditions and provisions which restrict the company’s payment of dividends. Under the most restrictive of these provisions, retained earnings of $137.7 million were unrestricted as of September 30, 2004.

4.	Long-Term Debt (continued)

On June 10, 2004, a new $265 million, five year revolving credit facility was entered into with a group of eight banks. The new facility expires on June 10, 2009, and it replaces a $250 million credit facility, which was terminated on June 10, 2004 prior to its scheduled expiration on August 2, 2004. The new facility backs up commercial paper and credit line borrowings. As a result of the long-term nature of this facility, the commercial paper and credit line borrowings are now classified as long-term debt.

5.	Product Warranty (dollars in millions)

The company offers warranties on the sales of certain of its products and records an accrual for the estimated future claims. Such accruals are based upon historical experience and management’s estimate of the level of future claims. The following table presents the company’s warranty liability activity for the nine-months ended September 30, 2004 and 2003, respectively:

	2004			2003
Balance at January 1	$	62.1		$	63.2
Expense		22.6			21.4
Claims settled		(25.1	)		(22.6	)

Balance at September 30	$	59.6		$	62.0

6.	Comprehensive Earnings (dollars in millions)

The company’s comprehensive earnings are comprised of net earnings, foreign currency translation adjustments, and realized and unrealized gains and losses on cash flow derivative instruments.

	Three Months Ended September 30					Nine Months Ended September 30
	2004		2003			2004			2003
Net Earnings	$	3.0	$	6.0		$	31.0		$	39.6
Other comprehensive earnings (loss):
Foreign currency translation adjustments		0.3		0.1			0.5			1.8
Unrealized net gains (losses) on cash
flow derivative instruments less related income
tax provision (benefit): 2004 - $1.1 & $(0.8),
2003 - $(1.6) & $2.9		1.8		(2.4	)		(1.3	)		4.6

Comprehensive Earnings	$	5.1	$	3.7		$	30.2		$	46.0

7.	Earnings per Share of Common Stock

The numerator for the calculation of basic and diluted earnings per share is net earnings. The following table sets forth the computation of basic and diluted weighted-average shares used in the earnings per share calculations:

	Three Months Ended September 30				Nine Months Ended September 30
	2004		2003		2004		2003
Denominator for basic earnings per
share - weighted average shares		29,297,877		29,074,083		29,257,451		29,007,013
Effect of dilutive stock options		558,305		706,028		636,592		646,286

Denominator for diluted earnings per share		29,856,182		29,780,111		29,894,043		29,653,299

8.	Stock Option Compensation

The company has one stock-based employee compensation plan as more fully described in Note 11 of Notes to Consolidated Financial Statements of the Company’s 2003 annual report on Form 10-K. SFAS No. 123, “Accounting for Stock-Based Compensation,” encourages, but does not require companies to record compensation cost for stock-based employee compensation plans at fair value. The company has chosen to continue applying Accounting Principles Board Opinion No. 25, “Accounting for Stock Issued to Employees,” and related interpretations in accounting for its stock options awarded under the plan. Accordingly, because the number of shares is fixed and the exercise price of the stock options equals the market price of the underlying stock on the date of grant, no compensation expense has been recognized.

Had compensation cost been determined based upon the fair value at the grant date for stock option awards under the plan based on the provisions of SFAS No. 123, the company’s pro forma earnings and earnings per share would have been as follows:

(dollars in millions, except per share amounts)	Three Months Ended September 30						Nine Months Ended September 30
	2004			2003			2004			2003
Earnings:
As reported	$	3.0		$	6.0		$	31.0		$	39.6
Deduct: Total stock option compensation expense
determined under fair value based method, net of tax		(0.5	)		(0.4	)		(1.5	)		(1.3	)

Pro forma	$	2.5		$	5.6		$	29.5		$	38.3

Earnings per share:
As reported:
Basic	$	0.10		$	0.21		$	1.06		$	1.36
Diluted		0.10			0.20			1.04			1.33
Pro forma:
Basic	$	0.08		$	0.19		$	1.01		$	1.32
Diluted		0.08			0.19			0.99			1.29

9.	Pensions (dollars in millions)

The following table presents the components of the company’s net pension credit.

	Three Months Ended September 30						Nine Months Ended September 30
	2004			2003			2004			2003
Service cost	$	2.1		$	1.9		$	6.4		$	5.7
Interest cost		11.6			11.7			34.7			35.1
Expected return on plan assets		(16.2	)		(16.6	)		(48.6	)		(49.8	)
Amortization of net actuarial loss		0.9			--			2.7			--
Amortization of prior service cost		0.1			0.1			0.3			0.3

Defined benefit plan income	$	(1.5	)	$	(2.9	)	$	(4.5	)	$	(8.7	)

As disclosed in the company’s 2003 Annual Report on Form 10-K, the company does not expect to contribute to its pension plans in 2004.

10.

Operations by Segment (dollars in millions)

	Three Months Ended September 30						Nine Months Ended September 30
	2004			2003			2004			2003
Net sales
Electrical Products	$	215.9		$	201.2		$	667.1		$	641.9
Water Systems		174.0			155.2			576.6			520.0

	$	389.9		$	356.4		$	1,243.7		$	1,161.9

Operating earnings
Electrical Products	$	12.6		$	9.6		$	47.1		$	45.9
Water Systems		(2.1	)		7.9			25.4			37.7

		10.5			17.5			72.5			83.6
Corporate expenses		(6.3	)		(5.1	)		(19.8	)		(15.2	)
Interest expense		(3.3	)		(3.1	)		(9.6	)		(9.0	)

Earnings before income taxes		0.9			9.3			43.1			59.4
(Credit) provision for income taxes		(2.1	)		3.3			12.1			19.8

Net earnings	$	3.0		$	6.0		$	31.0		$	39.6

Intersegment sales, which are immaterial, have been excluded from segment revenues.

PART I — FINANCIAL INFORMATION

ITEM 2 —MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

RESULTS OF OPERATIONS
THIRD QUARTER AND FIRST NINE MONTHS OF 2004 COMPARED TO 2003

Sales were $389.9 million in the third quarter of 2004, or 9.4 percent higher than in last year’s third quarter. Sales for the first nine months of the year were $1.24 billion or 7.0 percent higher than sales of $1.16 billion in the same period last year. The increase in third quarter and year-to-date sales was due primarily to higher prices related to the introduction of new regulatory-mandated water heaters, price increases related to increases in raw material costs, higher sales of electric motors and continued strong performance in our Chinese water heater operation.

Our gross profit margin for the third quarter of 2004 declined to 15.9 percent from 17.3 percent in the third quarter of 2003. Our year-to-date gross margin in 2004 was 18.4 percent compared with 19.2 percent in the same period in 2003. For the quarter and year-to-date, the decline in gross profit margin is in Water Systems and is primarily due to increased freight and material costs, partially offset by price increases and higher margins on new products.

Selling, general and administrative expenses in the third quarter and first nine months of 2004 were higher than the same periods in 2003 by $8.6 million and $20.5 million, respectively. The increases resulted primarily from higher selling and advertising costs at Water Systems, higher corporate expense and lower pension income. Also, the increase for the nine months is offset by a $3.3 million non-recurring favorable adjustment in our Water Systems segment which was recorded in the second quarter of 2004 and resulted from the reversal of a reserve established at the time of the State Industries acquisition.

Interest expense was $3.3 million in the third quarter or $.2 million higher than the same quarter last year due to higher interest rates. Interest expense for the first nine months of 2004 was $.6 million higher than the comparable period in 2003 due primarily to incremental interest on $50.0 million of senior notes issued in June 2003 to repay commercial paper.

We have significant pension benefit costs and credits that are developed from actuarial valuations. The valuations reflect key assumptions regarding, among other things, discount rates, expected return on assets, retirement ages, and years of service. Consideration is given to current market conditions, including changes in interest rates in making these assumptions. Our assumptions for the expected rate of return on pension plan assets is 9.0 percent in 2004, unchanged from 2003. The discount rate used to determine net periodic pension costs and credits decreased from 6.75 percent in 2003 to 6.25 percent in 2004. Pension income recognized in the third quarter and first nine months of 2004 was $1.5 million and $4.5 million, respectively, and compared with $2.9 million and $8.7 million in the comparable periods of 2003. Total pension income for 2004 is projected to be $6.0 million. Our pension income is reflected as reductions to cost of products sold and selling, general and administrative expense.

Our year-to-date 2004 effective tax rate was reduced from 33.5 percent to 28 percent as of September month end. The reduction was due to lower forecasted domestic earnings resulting in a larger portion of our earnings being concentrated in our foreign operations where the income tax rates are lower. The resulting year-to-date favorable adjustment amounted to $2.3 million and is reflected in the third quarter tax credit.

Net earnings for the third quarter of 2004 were $3.0 million or $.10 per share with $2.3 million or $.08 per share being attributable to the aforementioned tax rate adjustment. Net earnings for the third quarter of 2003 were $6.0 million or $.20 per share. Year-to-date earnings were $31.0 million or $1.04 per share and compare to nine month earnings of $39.6 million or $1.33 per share in 2003. The decline in earnings for both the third quarter and first nine months is due mostly to higher costs for freight and raw materials and operating inefficiencies which more than offset the positive impact of our product repositioning programs and new product introductions.

Electrical Products

Third quarter sales for our Electrical Products segment were $215.9 million, or $14.7 million higher than the third quarter of 2003. Third quarter sales to the pump, ventilation, general industries and Asian markets all increased by more than 15 percent while sales to the heating and air conditioning market were flat. Year-to-date sales for this segment increased by 3.9 percent from $641.9 million in 2003 to $667.1 million in 2004.

Operating earnings for our Electrical Products segment in the third quarter increased to $12.6 million from $9.6 million in the third quarter of 2003. The increase resulted from contribution from the higher sales and savings from the product repositioning program partially offset by higher raw material and freight costs. Earnings for the first nine months of 2004 were $47.1 million or $1.2 million higher than the same period last year.

Water Systems

Third quarter sales for our Water Systems segment were $174.0 million or $18.8 million higher than the third quarter of 2003. Year-to-date sales increased by 10.9 percent to $576.6 million in 2004. The sales increase in both the third quarter and first nine months was due to higher prices associated with new regulatory-mandated product, increased volume for commercial product, continued strong growth in China and price increases related to higher costs for steel and freight.

Our Water Systems segment incurred an operating loss of $2.1 million in the third quarter as compared to earnings of $7.9 million in the same period last year. Operating earnings decreased from $37.7 million in the first nine months of 2003 to $25.4 million in the same period in 2004. The earnings decline in both the third quarter and first nine months resulted from increased steel and freight costs, as well as manufacturing inefficiencies caused by the conversion of residential water heaters to meet new efficiency standards, standardization of the A. O. Smith and State Industries residential product lines, relocation of production between the Ashland City, TN, and McBee, S.C. plants and an information systems conversion. The adverse impact of higher costs for raw material, freight and conversion programs more than offset the benefit of the increase in sales.

Outlook

As a result of the revised income tax rate, we now project 2004 earnings to range between $1.05 and $1.10 per share.

Throughout the year our businesses have faced cost pressures due to increases in the price of steel, aluminum and other materials, as well as higher freight costs. Several price increases have been implemented in an effort to offset the cost increases. Costs have continued to rise. While our price increases mitigated this impact, they have not covered all of the cost increases. In order to cover these costs, including anticipated increases, we are again implementing significant price increases in both of our business segments, which will take effect in the first quarter of 2005.

Liquidity & Capital Resources

Our working capital, excluding short-term debt, was $353.2 million at September 30, 2004, $47.3 million higher than at December 31, 2003. The majority of the increase in working capital was due to an increase in accounts receivable balances of $36.3 million related to higher sales levels. In addition, higher inventory levels of $14.6 million, primarily made up of higher finished goods at Water Systems, contributed to the higher working capital. Cash provided by operating activities during the first nine months of 2004 was $26.1 million, the same level of cash provided by operating activities through the first nine months last year. As a result of lower expected earnings and higher working capital during the second half of 2004, we now project cash provided by operating activities to be between $60 and $70 million for the full year.

Our capital expenditures during the first nine months of 2004 totaled $29.5 million, compared to $28.1 million spent through the first nine months of 2003. We are projecting 2004 capital expenditures to approximate $45 million, about the same level as 2003 spending. We believe that our present facilities and planned capital expenditures are sufficient to provide adequate capacity for our operations in 2004.

Our total debt increased by $19.5 million from $275.5 million at December 31, 2003 to $295.0 million at September 30, 2004. Our leverage as measured by the ratio of total debt to total capitalization was 33%, up slightly from the 32% at the end of 2003. We did not enter into any significant operating leases during the first nine months of 2004. At September 30, 2004, our company had available borrowing capacity of $147.5 million under our credit facility. We believe that the combination of available borrowing capacity and operating cash flow will provide sufficient funds to finance our existing operations for the foreseeable future.

On October 12, 2004, our board of directors declared a regular quarterly cash dividend of $.16 per share on our Common stock and Class A common stock, which is payable on November 15, 2004 to stockholders of record on October 29, 2004.

Critical Accounting Policies

Our accounting policies are described in Note 1 of Notes to Consolidated Financial Statements as disclosed in the Form 10-K for the fiscal year ended December 31, 2003. Also as disclosed in Note 1, the preparation of financial statements in conformity with accounting principles generally accepted in the United States requires the use of estimates and assumptions about future events that affect the amounts reported in the financial statements and accompanying notes. Future events and their effects cannot be determined with absolute certainty. Therefore, the determination of estimates requires the exercise of judgment. Actual results inevitably will differ from those estimates, and such differences may be material to the financial statements.

The most significant accounting estimates inherent in the preparation of our financial statements include estimates associated with the evaluation of the impairment of goodwill, as well as the recoverability of receivables resulting from the payment of claims associated with the dip tube class action lawsuit (see Part II, Item I of this report). There are also significant estimates used in the determination of liabilities related to warranty activity, litigation, product liability, environmental matters and pensions and other post-retirement benefits. Various assumptions and other factors underlie the determination of these significant estimates. The process of determining significant estimates is fact-specific and takes into account factors such as historical experience and trends, and in some cases, actuarial techniques. We constantly reevaluate these significant factors and adjustments are made when facts and circumstances dictate. Historically, actual results have not significantly deviated from those determined using the estimates described above.

ITEM 3 – QUANTITATIVE AND QUALITATIVE DISCLOSURE OF MARKET RISK

As is more fully described in our annual report on Form 10-K for the year ended December 31, 2003, we are exposed to various types of market risks, primarily currency and certain commodities. We monitor our risks in these areas on a continuous basis and generally enter into forward and futures contracts to minimize these exposures for periods of less than one year. Our company does not engage in speculation in our derivative strategies. It is important to note that gains and losses from our forward and futures contract activities are offset by changes in the underlying costs of the transactions being hedged.

ITEM 4 – CONTROLS AND PROCEDURES

Evaluation of disclosure controls and procedures

The chief executive officer and chief financial officer have evaluated the effectiveness of the company’s disclosure controls and procedures as of September 30, 2004 and have concluded that these disclosure controls and procedures were adequate and effective to ensure that material information relating to the company and its consolidated subsidiaries would be made known to them by others within those entities.

Changes in internal controls

There were no significant changes in our internal controls over financial reporting or in other factors that could significantly affect our disclosure controls and procedures nor were there any significant deficiencies or material weaknesses in our internal controls. As a result, no corrective actions were required or undertaken.

Forward Looking Statements

This filing contains statements that we believe are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements generally can be identified by the use of words such as “may,” “will,” “expect,” “intend,” “estimate,” “anticipate,” “believe,” “continue,” or words of similar meaning. These forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those anticipated as of the date of this release. Factors that could cause such a variance include the following: instability in our electric motor and water products markets; the inability to generate the synergistic cost savings from the acquisition of State Industries; the inability to implement cost-reduction programs; adverse changes in general economic conditions; significant increases in raw material prices; competitive pressures on our company’s businesses; and the potential that assumptions on which we based our expectations are inaccurate or will prove to be incorrect.

Forward-looking statements included in this filing are made only as of the date of this filing, and our company is under no obligation to update these statements to reflect subsequent events or circumstances. All subsequent written and oral forward-looking statements attributed to A. O. Smith, or persons acting on its behalf, are qualified entirely by these cautionary statements.

PART II — OTHER INFORMATION

ITEM 1 — LEGAL PROCEEDINGS

There have been no material changes in the legal and environmental matters previously reported in Part I, Item 3 and Note 14 of the Notes to Consolidated Financial Statements in the company’s Annual Report on Form 10-K for the year ended December 31, 2003, and Part II, Item 1 in the company’s quarterly report on Form 10-Q for the quarter ended June 30, 2004, which are incorporated herein by reference.

ITEM 4 — SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

None.

ITEM 5 — OTHER INFORMATION

None.

ITEM 6 — EXHIBITS AND REPORTS ON FORM 8-K

On July 13, 2004, the Company filed a Current Report on Form 8-K, reporting under Item 5, announcing an increased quarterly dividend and announcing judgment in the dip tube trial. On July 15, 2004, the Company filed a Current Report on Form 8-K, reporting under Items 7 and 12, announcing the Company’s results for the quarter ended June 30, 2004.

On September 14, 2004, the Company filed a Current Report on Form 8-K, reporting under Items 7.01 and 9.01, reducing the Company’s third quarter and full year earnings estimates.

On October 14, 2004, the Company filed a Current Report on Form 8-K, reporting under Items 2.02 and 9.01 announcing the Company’s results for the quarter ended September 30, 2004.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has authorized this report to be signed on its behalf by the undersigned.

	A.O. SMITH CORPORATION
November 1, 2004	/s/John J. Kita
	John J. Kita
	Vice President,
	Treasurer and Controller
November 1, 2004	/s/Kenneth W. Krueger
	Kenneth W. Krueger
	Senior Vice President
	and Chief Financial Officer

INDEX TO EXHIBITS

Exhibit
Number

Description

31.1	Certification of Periodic Report by the Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934.

31.2	Certification of Periodic Report by the Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934.

32	Written Statement of the Chief Executive Officer and the Chief Financial Officer pursuant to 18 U.S.C. Section 1350.

Exhibit 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Robert J. O’Toole, Chairman and Chief Executive Officer, certify that:

1.	I have reviewed this quarterly report on Form 10-Q of A. O. Smith Corporation (the “company”);

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4.	The company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the company and we have:

Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

Evaluated the effectiveness of the company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

Disclosed in this report any changes in the company’s internal control over financial reporting that occurred during the company’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the company’s internal control over financial reporting; and

5.	The company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company’s auditors and the audit committee of the company’s board of directors (or persons performing the equivalent function):

All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the company’s ability to record, process, summarize and report financial information; and

Any fraud, whether or not material, that involves management or other employees who have a significant role in the company’s internal control over financial reporting.

Date: November 1, 2004

/s/ Robert J. O’Toole
Robert J. O’Toole
Chairman and Chief Executive Officer

Exhibit 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Kenneth W. Krueger, Senior Vice President and Chief Financial Officer, certify that:

1.	I have reviewed this quarterly report on Form 10-Q of A. O. Smith Corporation (the “company”);

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4.	The company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the company and we have:

5.	The company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company’s auditors and the audit committee of the company’s board of directors (or persons performing the equivalent function):

Any fraud, whether or not material, that involves management or other employees who have a significant role in the company’s internal control over financial reporting.

Date: November 1, 2004

/s/ Kenneth W. Krueger
Kenneth W. Krueger
Senior Vice President and Chief Financial Officer

Exhibit 32

Written Statement of the Chief Executive Officer and the
Chief Financial Officer Pursuant to 18 U.S.C. Section 1350

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, each of the undersigned certifies that to the best of our knowledge:

(1)	the Quarterly Report on Form 10-Q of A. O. Smith Corporation for the quarter ended September 30, 2004 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and

(2)	the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of A. O. Smith Corporation.

Date: November 1, 2004

/s/ Robert J. O’Toole
Robert J. O’Toole
Chairman and Chief Executive Officer

/s/ Kenneth W. Krueger
Kenneth W. Krueger
Senior Vice President and Chief Financial Officer

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

OR

A.O. SMITH CORPORATION

Index

A. O. Smith Corporation

PART I--FINANCIAL INFORMATION

A. O. SMITH CORPORATION NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS September 30, 2004 (unaudited)

PART I — FINANCIAL INFORMATION

RESULTS OF OPERATIONS THIRD QUARTER AND FIRST NINE MONTHS OF 2004 COMPARED TO 2003

Outlook

Liquidity & Capital Resources

Critical Accounting Policies

Evaluation of disclosure controls and procedures

Changes in internal controls

Forward Looking Statements

PART II — OTHER INFORMATION

INDEX TO EXHIBITS

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

CERTIFICATION OF CHIEF FINANCIAL OFFICER

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q

A. O. SMITH CORPORATION
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
September 30, 2004
(unaudited)

RESULTS OF OPERATIONS
THIRD QUARTER AND FIRST NINE MONTHS OF 2004 COMPARED TO 2003