IMH Flow Control Valves for installation into plastic are, functionally, an orifice in parallel with a check valve, all in one compact, cartridge-style package. The valve are available in two diameters; 5.5mm and 8.0mm. They feature easy, press-in installation, and can be installed in either direction, providing forward and reverse flow capability. Where screening is necessary, companion screens are available in four different micron ratings.