Hayward Check Valve, 1/2 in, Single, Y Spring, PVC, FNPT x FNPT - SLC10050TU Spout Length-2.5" They're made of metal to

They're made of metal to provide a finished appearance and resist odors and staining

The roller is spring loaded for easy replenishing and designed so that it turns freely

Model has a non-removable flow compensator that keeps the flow rate constant regardless of water pressure

The replaceable filter is housed in a separate chamber

Hayward Check Valve, 1/2 in, Single, Y Spring, PVC, FNPT x FNPT - SLC10050TU Spout Length-2.5" They're made of metal toItem Check Valves: Check Valve; Flow Design: Single; Mechanism and Body Design: Y Spring; Body Material Valves: PVC; Pipe or Tube Size Check Valves: 1 2 in; Connection Type Check Valves: FNPT x FNPT; Cracking Pressure Check Valves: 2 to 15 psi; Mounting Orientation Check Valves: Horizontal, Vertical; Seal Material Check Valves: FPM; Max. Temp. Valves: 140 Degrees F; Min. Temp. Valves: 40 Degrees F; Max. Water Pressure Valves: 150 psi @ 70 Degrees F;