Watts 0590719 Air Vent specifically calibrated to meter Liquid

specifically calibrated to meter Liquid Propane flow rates for residential furnace applications

and a stainless cotter pin

providing a fail-safe cutoff to prevent dangerous overheating if airflow is restricted or the primary limit fails to trip

Run capacitors remain in the circuit continuously

Watts 0590719 Air Vent specifically calibrated to meter LiquidThe Watts 0590719 is a high performance 1 8 inch NPT air vent designed for veteran contractors who require reliable air elimination in pressurized hydronic heating systems. Engineered as a direct replacement for the DUOVENT 1 8, this unit features a rugged brass body and cover capable of handling system pressures up to 150 PSI and temperatures reaching 240F. Its unique dual function design incorporates an automatic vent with a black cap for continuous