Check Valve, Cartridge Back Catalog number: CTS-21480 Availability: In the manufacturer's stock Price on request - + Recommended CTS-10597 Wash Tube Seal Kit, 4/pk Price on request 11-4052 Needle Seal, SIL-30AC, SIL-30ACMP Price on request 11-4073 LC-30AD Plunger Holder Assembly, UHP2 (w/Diaphragm Price on request