Needle Seal (For pH 1-14, for operation up to 130 Back Catalog number: CTS-21089 Availability: In the manufacturer's stock Price on request - + Recommended CTS-10770 Waste Valve, V3 (2 Way Solenoid Valve) Price on request CTS-21129 Check Valve, Ti, Price on request CTS-10761 HPMV 1 & 2 Rebuild Kit w/Spool Price on request