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Designed to ease installation and removal this GEORG FISCHER check valve features vibration free performance even at high flow velocity. Spring-loaded model has a flow-optimized return cone, double guided. Sealing at a minimum water column of 0.5m Vertical or horizontal mounting eases installation Item: Check Valve Material of Construction: PVC Size: 1" Connection Type: Socket/Threaded Length: 5-15/64" Width: 2-11/16" Overall Height: 2-11/16" Cracking Pressure: 2 a 3 psi Max. Temp.: 140 Degrees F Mounting Position: Vertical or Horizontal Seat Material: EPDM Spring Material: Stainless Steel Seal Material: EPDM