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    Rola-Chem Check Valve Assy, PVC, 3/8in Barb X 1/4in NPT, 521170

    Item # ZROL1040 Manuf.# 521170

      Rola-Chem check valves are screwed into the pipe, at the point of chemical injection into the pipe, to prevent back flow of water. Install the RolaChem check valve by screwing into the pipe (with Teflon tape), with the arrow in the direction of water flow. 

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