HyperLogic 1" Schedule 80 PVC Monitor Crosses are designed to be used near the Inlet and Outlet of a Prefiltration Media Tank to provide helpful operational pressure and pressure delta information on our water equipment. Each Monitor Cross features a liquid filled pressure gauge for monitoring water pressure and a labcock test port allowing easy access to water testing locations when installed. 1" female slip fittings on Inlet & Outlet. Formerly HyperLogic HL 11681.1