• Replacement for Rainbow HC-3315, HC-3330 and HC-3340 chemical feeders (high capacity models) 

• Pentair replacement Part 

• Part Number R172240 

The Pentair R172240 is a replacement O-Ring for lid housing that is fully compatible and made to the manufacturers’ OEM specifications. This pool O-Ring will maintain the efficiency of pool equipment by maintaining a proper air seal. It also helps keep pool chemicals working at their most effective and filters running at their most efficient. Replace worn O-Rings with a Pentair O-ring when you see signs that the old ring is swollen or cracked.