WFR's hydrant test cap is designed for determining the static pressure of water in fire hydrants, fire hoses, and/or fire pumps. NPSH threads are standard for 1.5" caps and BAT or WCT threads are standard for 2.5" caps. Custom threads are available upon request. A 2.5"(65mm) liquid filled, 0-160 psi gauge is standard. The gauge face is marked in large easy to read 2 psi increments, and has a ± 1% full scale accuracy certified by the gauge manufacturer. Gauges with higher pressure ranges are available on request. Rated for 300 psi.