Rainbow R172240 High Capacity Chemical Feeder Lid O-Ring

The Rainbow R172240 Chemical Feeder Lid O-Ring fits the Rainbow High Capacity HC-3315, HC-3330 and HC-3340 automatic pool and spa chemical feeders. If the O-Ring is swollen or cracked it can cause equipment to suck air and spit air back into the pool through inlets and it must be replaced. Not replacing O-rings can damage your pool equipment, have a negative effect on filtration and decrease the efficiency of pool chemicals.