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RESIDENTIAL GAS AND ELECTRIC WATER HEATER
SERVICE HANDBOOK
The information contained in this handbook is designed to answer commonly faced
situations encountered in the operation of the Residential Gas and Electric product line and is not
meant to be all-inclusive. If you are experiencing a problem not covered in this handbook, please
contact the A.O. Smith Technical Information Center at 1-800-527-1953 or your local A.O. Smith
Water Products Company representative for further assistance. Additional information is also
available on the web site
www.aosmithwaterheaters.com. This handbook is intended for use by
licensed plumbing professionals and reference should be made to the instructional manual
accompanying the product. This handbook contains supplemental information to the Residential
Gas and Electric instructional manual.
Qualifications
Tools Required:
For servicing gas models:
Cross top screw driver
3/8, 7/16, ¾ inch open end wrenches
3/16 inch Allen wrench
11/16 inch – 6 point – socket – for anode removal
set of marked drill bits
electrical multimeter
gas pressure gauge or monometer
water pressure gauge
thermometer
tubing cutter if pilot tube is to be replaced
hose – to drain tank
container – to measure gallons per minute flow
For servicing electric models:
1 1/16 inch – 6 point – socket (for anode removal)
1 ½ inch deep socket – to remove an element
electrical multimeter
water pressure gauge
thermometer
hose – to drain tank
container – to measure gallons per minute flow
Rev 1 adds Technical Bulletins
Rev 2 corrects illustration errors
Rev 3 adds FVIR (C3) Technology product information
2005 printing – revised cover
A.O. Smith Water Products Company Technical Training Department
©2005 Ashland City, TN
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