The SMC 6870090 check valve is made with polypropylene and has a maximum pressure of 125 PSI. Keeps flow of fluids in the proper direction to maintain optimal pressure levels and flow rates. Install downstream from pump for water hammer protection. May be installed vertically or horizontally. Specifications: 3/4" FNPT x 3/4" FNPT connection ports Seat material glass filled polypropylene 1 PSI cracking pressure 125 PSI maximum pressure Polypropylene construction Stainless Steel spring Max Operating Temperature: 140 F Viton seals 17GPM one-way check valve Hex size 0.94in Weight: .11 lbs. Additional Details ------------------------------ Bullet point: 3/4" NPT x 3/4" NPT CONNECTION CHECK VALVE: Ensure smooth water flow with this high-quality 3/4 check valve designed for reliable performance in your water pump system. Built for longevity, this check valve features a secure 3/4" NPT connection on both ends, making it compatible with various PVC valve and piping setups. Ideal for preventing backflow and maintaining consistent pressure, this valve offers essential protection and efficiency for your water systems. Product description: The SMC 6870090 check valve is made with polypropylene and has a maximum pressure of 125 PSI. Keeps flow of fluids in the proper direction to maintain optimal pressure levels and flow rates. Install downstream from pump for water hammer protection. May be installed vertically or horizontally. Specifications: 3/4" FNPT x 3/4" FNPT connection ports Seat material glass filled polypropylene 1 PSI cracking pressure 125 PSI maximum pressure Polypropylene construction Stainless Steel spring Max Operating Temperature: 140 F Viton seals 17GPM one-way check valve Hex size 0.94in Weight: .11 lbs.