Hydro-Logic® HyperLogic 1 Inch 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 their 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 inch female slip fittings on inlet and outlet. Formerly HyperLogic HL 11681.1