O-Ring Set for Big Blue & Clear Housing 20'' or 10'' with input 3/4'', 1'', 1.5'' (housing sold separately)(set of 2)
for Big & Compact Blue and Clear Housings
O-rings should be replaced when changing the filter cartridge to avoid possible water leakage.
For Housing Sets: Big Duo or Filter Bundle: CB2-SED-CAB20-BB
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