553649A* Caleffi 553 Auto Fill Valve. 1/2" Sweat Union Inlet, 1/2" FNPT Outlet, W/Gauge.

Pre-adjustable automatic filling valve, anti-scale, visual system pressure indicator. Complete with manual shut-off valve, strainer and check valve.
Brass body. Max. inlet pressure: 230 psi. Max. working temperature: 150 °F. Setting pressure range: 3—60 psi. Preset outlet pressure: 15 psi.
Pressure gauge scale: 0—60 psi / 0—4 bar.