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
Exact replacement part, works great.
The lack of this simple part kept me out of my hot tub. The part worked perfectly with no leaking.