Catalog Plastic Check Valves3300 SeriesCategory: Inline Check Valve, Plastic Check ValveDesign: Economical, Zero Leakage, CompactConfigurations: BarbMaterials: Nylon, Polypropylene, KynarO-rings: Viton, EPDM, SiliconeMax Pressure: 125 psiCrack Pressure: 1/2 psi