Inlet Check Valve Back Catalog number: CTS-21145 Availability: In the manufacturer's stock Price on request - + Recommended CTS-10711 Alliance Head Plunger Seal Kit, Black, 2/pk Price on request CTS-5656 Sapphire Plunger Price on request 11-4122 PTFE Diaphragm, LC-30AD/i-Series, 2/pk Price on request