Pentair R172324 Flow Indicator Inline Check Valve

Replacement in-line check valve for Pentair Rainbow automatic feeders and flow indicators (R172324). It prevents backflow in 1/2-inch chemical feed lines to keep corrosive water from traveling back into the system. 1/2″ tube x 1/2″ tube connections; OEM part installs in-line-cut the feeder inlet tubing and orient the arrow with flow.