Model 3602FR heavy-duty modular

The ABS plastic spout is chrome-plated and includes a spring loaded

RPTFE seats

They're made of plastic or rubber and used as replacements for rings

Stainless steel check valves have fluorocarbon seats

Watts Bronze Safety Relief Valve, FNPT Inlet Type, FNPT Outlet Type - 2 174A-125 Height-18" Model 3602FR heavy-duty modularSafety Relief Valve; Body Material: Bronze; Inlet Type: FNPT; Outlet Type: FNPT; Inlet Size: 2 in; Outlet Size: 2 in; Factory Set Pressure: 125 psi; Pressure Range: 30 to 150 psi; BtuH: 12,170,000; Disc Material: Silicone; Overall Height: 11 5 8 in; Application: For Pressure Protection of Hot Water Heating Boilers; Overall Length: 6 1 4 in; Seat Material: Bronze; Spring Material: Stainless Steel; Temp. Range: 0 Degrees to 250 Degrees F; Test Lever: