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AO Smith
Gas Water Heater

Model # GPDX75100 Official AO Smith water heater

Here are the diagrams and repair parts for Official AO Smith GPDX75100 water heater, as well as links to manuals and error code tables, if available.

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Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

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Error Codes

Model diagram and schematic

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ALL PARTS
Showing 10 of 46 parts  |
Nipple 184633-002
#NI

Water heater diagram

Nipple

Part #184633-002

Replaced by #100108409

?
Manufacturer substitution
This part replaces 184633-002. Substitute parts can look different from the original.
$25.71
In Stock
Dip Tube 183900-028
#13

Water heater diagram

Dip tube

Part #183900-028

Replaced by #9003667005

?
Manufacturer substitution
This part replaces 183900-028. Substitute parts can look different from the original.
$8.49
In Stock
Anode Rod 183523-039
#14

Water heater diagram

Anode rod

Part #183523-039

Replaced by #100109594

?
Manufacturer substitution
This part replaces 183523-039. Substitute parts can look different from the original.
$55.56
In Stock
Inlet Tube 183901-040
#13A

Water heater diagram

Inlet tube

Part #183901-040

Replaced by #9002432005

?
Manufacturer substitution
This part replaces 183901-040. Substitute parts can look different from the original.
$26.99
In Stock
Temperature Valve 043151-000
#12

Water heater diagram

Temperature valve

Part #043151-000

The manufacturer no longer makes this part, and there's no substitute part

Natural Gas Orifice 181507-028
#18A

Water heater diagram

Natural gas orifice

Part #181507-028

The manufacturer no longer makes this part, and there's no substitute part

Drain Valve 026273-007
#21

Water heater diagram

Drain valve

Part #026273-007

The manufacturer no longer makes this part, and there's no substitute part

Thermostat 184768-002
#27

Water heater diagram

Thermostat

Part #184768-002

The manufacturer no longer makes this part, and there's no substitute part

Wiring Harness 184289-000
#15

Water heater diagram

Wiring harness

Part #184289-000

The manufacturer no longer makes this part, and there's no substitute part

Bracket 185264-000
#29

Water heater diagram

Bracket

Part #185264-000

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your water heaters

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Why isn't my water heater making the water hot enough?

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Why is there water in my water heater's drain pan?

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Why is my water heater's pressure relief valve dripping water?

Main causes: faulty pressure relief valve, water is overheating…

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Why isn't my water heater making enough hot water?

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