Pick the brand
The brand is printed on the same plate as the model number.
Parts that come up most
The part numbers listed for the most water heaters in the index. Open one to see every model it fits.

9000308Heating element gasket110 water heaters
9000509Thermostat89 water heaters
100108455Wheelers water heater temperature and pressure relief valve88 water heaters
9000507Thermostat73 water heaters
100108279Temperature and pressure relief valve64 water heaters
100109106Drain valve41 water heaters
100109624Anode rod40 water heaters
100108414Element ga36 water heaters
100108290Element31 water heaters
100108660Anode rod24 water heaters
100112699Manifold door gasket24 water heaters
100109594Anode rod20 water heatersWhere the model number is
On water heaters, the plate or sticker sits in one of a few places.
Water heaters: On the large label on the side of the tank, near the gas valve or the upper access cover.