Inlet Check Valve Back Catalog number: CTS-A159 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request CTS-11119-02 Head Plunger Seal, 2/pk Price on request CTS-0720 Inlet Check Valve Assembly Price on request