Outlet Check Valve Back Catalog number: CTS-A11187 Manufacturer: SCIENCIX Availability: 3 weeks Price on request - + Recommended CTS-A11145 Tube Assy, System Outlet, SDS Price on request CTS-21089 Needle Seal (For pH 1-14, for operation up to 130 Price on request CTS-A121 Outlet Check Valve Price on request