Check Valve Cartridge, 2/pk Back Catalog number: CTS-10493 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A117 Inlet Check Valve Price on request CTS-10711 Alliance Head Plunger Seal Kit, Black, 2/pk Price on request CTS-10692 HPMV Gold Seals, 2/pk Price on request