Whirlpool parts are AO Smith-manufactured (same factory as State and AO Smith Signature). Interchange in most cases. Sold at Lowe\'s, Amazon, and AO Smith distribution.
The Whirlpool parts catalog
- Anode rod — single highest-ROI maintenance. Replace every 4-7 years
- Heating element — electric tanks. Upper and lower
- Thermostat — electric upper (with ECO) and lower
- Gas valve — integrated control; dealer-only replacement
- Thermocouple — standing pilot gas units
- Dip tube — broken = hot water runs out fast
Where to buy
- Amazon — anode rods, elements, thermostats, thermocouples
- Lowe\'s — Whirlpool is the volume Lowe\'s brand
- Plumbing wholesaler — Ferguson, Hajoca via AO Smith distribution
- Authorized installer — full catalog
Cross-brand parts compatibility
Most Whirlpool parts interchange with State and AO Smith Signature parts (same manufacturing). Exceptions: gas valves and ignition modules are model-specific.
Bottom line
Anode rod, element, thermostat, thermocouple, dip tube — DIY-replaceable. Gas valve through authorized installer.