Rainbow/Pentair Filter Air Vent Valve, Life Gard Dynamic RTL/RCF/RDC Series. Functions both as air bleeder knob valve and as filter housing drain plug on RDC25 and RDC50 filters.
Threads into filter manifold top, or filter housing bottom
O-ring included
Product notes: OEM# 172224X
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O-Ring for Rainbow Filter/Feeder Air Relief Plug 2-Pack
