Efficient Flow Rates: A 5/8" orifice delivers a 4

Built to commercial-grade standards

the Illinois 36859 seat provides a stable valve seat interface that reacts accurately to temperature fluctuations

maximizing HVAC system reliability in demanding climates

Durable Construction: Built with high-grade brass and copper to withstand demanding thermal cycling in heat pump reversing valve applications

Reznor 110320 Valve 321142-301 Efficient Flow Rates: A 5/8"The Reznor 110320 Valve is a specialized 1 2" NPT Foot Valve engineered for critical fluid control in waste oil heaters and unit heating systems. This Valstop check valve features a robust brass construction that stands up to the varying viscosities and corrosive properties of used oils. Designed specifically for the suction line, it maintains a consistent prime by preventing fluid backflow when the pump is idle. The integrated strainer prevents