R400 Robert Manufacturing 3/4" NPT Inlet x 3/4" NPT Outlet BOB Brass Float Valve The R400 Series is a high capacity float valve with male NPT inlet and outlet connections. The model features an adjustable short arm for customizing water level. Applications include cooling towers, livestock waterers, car washes, high pressure washes, swimming pools and many other agricultural and industrial applications. Construction: Heavy duty cast brass with standard nitrile seals. Free discharge Flow Capacity: 21 GPM at 35 psi, 32.5 GPM at 65 psi and 68.5 GPM at 85 psi. Weight: 0.82 Lbs. Lead Free.