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Parts List: A.O. Smith ESTT-40

  1. Use the chart to find the part you need to order. A diagram of the unit is below the chart to assist you in locating your part.
  2. Click on the underlined link to go directly to the part's page for pricing and ordering.
  3. *For parts that are not underlined and do not have a link, please Contact Us for price and availability.
  4. The manufacturer has changed some part numbers to a new part number, and we have referenced the new part number in the chart (if applicable). Please note that the manufacturer may change part numbers and availability at any time.
  5. You can download and print the original PDF of the A.O. Smith parts list at the bottom of the page.
Item Description
ESTT-40
1 Access Panel 4303171*
2 Dip Tube 183900-024 (new # 9001598005)
3 Dip Tube Seal 184011-000 (new # 9002277015)
4 Drain Valve 042037-000 (new # 9002402015)
5*** Drain Valve Washer (17/32 x 13/64 x 1/8 Thick) N/A
6 Lower Element 042286-022 (new # 9000095015)
6 Upper Element 042286-021 (new # 9000092015)
7 Element Gasket 0005300370 (new # 9007159015)
8 Primary Anode Rod 183523-016 (new # 9003944005)
9 T & P Relief Valve 076527-000 (new # 9000071015)
10 Terminal Cover with High Limit 183530-000 (new # 9003914015)
11 Thermostat Bracket 184608-000 (new # 9000309015)
12 Thermostat with High Limit 183534-000 (new # 9001954015)
13 Junction Box Bracket with CDT Hole 184659-000
14 Junction Box Cover 184660-000
15 Porcelain Top 1504940*
16 Drain Access Door 3900550*
17 Toe Panel 4300170*
19 Terminal Cover 183529-000 (new # 9002276015)
20 Lower Thermostat 183532-000 (new # 9000507015)
NOTES:
- The manufacturer may change part numbers and availability at any time.
*** Available at most hardware stores



 

Download original AO Smith Parts List
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