VALVE, FLOW CONTROL W/ METERING Pacific Bay Equipment Sale! from $70.00 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Chemical Metering Valve - Flow Control Has presettable limiting orifice Forged-Brass Body PSI: 4000 GPM: 6 1/4" Inlet, Outlet Adjusts from off to full flow