H&C .5 GPM Air Control Metering -04-M, 2590-051-001 Acorn

The “H&C” metering valve you are likely looking for is the Acorn 2590 H&C Air-Trol Metering Valve (0.5 GPM). This pneumatic, non-hold-open hot/cold metering valve is primarily used in commercial and correctional facility settings, such as secure combination sink-and-toilet units.