535061A Caleffi 5350 Autofill Valve 1" NPT Male Union.

Automatic filling valve. Complete with integral downstream pressure gauge and pressure setting adjustment knob. Max. working pressure: 365 psi. Max. working temperature: 140 °F. Pressure gauge scale: 0—100 psi / 0—7 bar. Pressure setting range: 6—90 psi. Preset outlet pressure: 15 psi.