Taco 329-3 1/2 Inch Fpt Fast Fill Reduc Valve

The Taco 329-3 Fast Fill Pressure Reducing Valve is a component used in hydronic piping networks to manage water supply pressure and support controlled filling of closed-loop circuits within HVAC systems in commercial heating and cooling setups. It is designed with a 1/2-inch female pipe thread (1/2" FPT) connection and includes a fast-fill mode that allows higher flow during initial charging before automatically shifting to regulated pressure operation. Fitted in boiler feed lines and chilled water systems, this unit assists in maintaining steady water replenishment, reduces pressure fluctuations during start-up, and supports consistent system operation in hydronic applications.