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a dirty air filter
Maintains internal relief valve accuracy by providing a consistent port diameter
dry flange surfaces
For technicians performing a 70665401 relay replacement
Watts 0590715 Air Vent a dirty air filterThe Watts 0590715, also known as the FV 4M1 1 8, is a heavy duty automatic air vent designed for high performance venting in residential and commercial hydronic heating systems. Featuring a rugged brass body and cover, this 1 8 inch NPT vent is engineered to purge trapped air from hot or cold water distribution lines automatically. With a maximum pressure of 150 PSI and a temperature rating up to 240F, it is a reliable choice for demanding
