HM512/HM509 WATER TANK. comes with gasket. Gasket no longer sold as a seperate item.

This part is also known as: 50033181-001, 50033182-001, B0DZM32TFH

Does your part fit?

Many replacement parts look correct but won’t fit your model. This humidifier part fits the following models:

HONEYWELL:
HM509, HM509DG115, HM506h8908, HM506A1000, HM512, HM509H8908
Rheem:
RXIH-AS06A, RXIH-AS12A, RXIH-AS09A