The Quad-Flo Bypass Valve from Tomlinson Industries is a four-way, two-position bypass valve made of solid brass, featuring the Teflon Quad-Seal to ensure a smooth positive operating action. A single two-position handle requires an easy 90-degee turn for full service to bypass. This design produces a positive seal and protects all internal sealing surfaces from water flow. Quad-Flo is available in 3/4" and 1" connections. Tomlinson Industries.