Pressure Regulator Valve BX421, BX427, MX450 & MX470 Stone Polishing Diamond Pads the locking drawstring helps to

the locking drawstring helps to keep your hoses from spilling out

per hour Injection Ports 2 x flushing ports Hose Compatibility 1

Made of light-weight strong aluminium

supplied with the PGUC-250 mount

Pressure Regulator Valve BX421, BX427, MX450 & MX470 Stone Polishing Diamond Pads the locking drawstring helps toOverview Modified high pressure by pass valve. HydraMaster part number 000 169 083, listed as Valve, Hi PSI By Pass Modified and, in the suggested spares schedule, as valve, mod. hi pressure bypass. The by pass valve is what sets solution pressure. It holds the pump's output at the set point and dumps the excess back to the water box. Almost every pressure complaint on a truckmount comes back to this valve, the pump, or a restriction and the by pass