Weil McLain 590-317-495 Round Tankless Heater Gasket

The Weil McLain 590-317-495 Round Tankless Heater Gasket is a sealing component used in tankless water heating assemblies to create a tight interface between the heater body and connected fittings. It is positioned within HVAC systems in hydronic heating units where it prevents leakage at the connection point between mating surfaces. The gasket supports proper sealing around the round tankless heater section, maintaining separation between water passages and external joints. It is commonly used in residential boiler setups during maintenance or assembly to ensure secure fitment and stable operation across compatible heating water circulation applications.