Outlet Check Valve Back Catalog number: CTS-A157 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11336 Cartridge, Intelligent Valve Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request CTS-21169 Assy, Capillary, 90mm x 0.17mm ID, w/Fittings Price on request