Replacement for Pentair R172221 Pressure Relief knob oring R172221 for Pentair Rainbow Pressure Filter lid Replacement for FIL11300100 and 172385a Pressure Filter lids

Replacement for Pentair Part Number R172221 (R172221)
Identical in Form, Fit, and Function to OEM Specification
Vent valve o-ring replacement (same as R172224). Fits Pentair Automatic Feeders High Capacity (HC-3315, HC-3330, HC-3340), Pentair Dynamic Series I Filter. Fits Pentair Dynamic series I, II RTL/RCF, III RTL/RCF inline pool/spa cartridge filter models RDC-25, RDC-25S, RDC-50, RDC-50S. Also fits Pentair Rainbow high capacity automatic chlorine/bromine pool and spa feeder models HC-3315, HC-3330, HC-3340. Also compatible with Pentair Dynamic RCF-RTL series cartridge filter chlorine/bromine dispensers. Pressure relief knob oring R172221 for Pentair Rainbow pressure filter lid fits FIL11300100 and 172385a pressure filter lids

Premium heavy-duty materials for durability and performance.
Made in the USA. Packaged in the USA. Shipped from the USA. American owned. American operated.

Replacing this O-ring can return your pool system back to peak performance and efficiency, eliminate leaks, and prolong the life of your investment.
Keep a spare on hand to eliminate unplanned down time.
We recommend lubricating all O-rings with a quality silicone-based lubricant designed for O-rings.
The brand names and logos are the registered trademarks of their respective owners. Any use of the brand name or model designation for this product is solely for purposes of demonstrating compatibility.

• Replacement for Pentair Part Number R172221
• Vent valve o-ring replacement (same as R172224). Fits Pentair Automatic Feeders High Capacity (HC-3315, HC-3330, HC-3340), Pentair Dynamic Series I Filter. Fits Pentair Dynamic series I, II RTL/RCF, III RTL/RCF inline pool/spa cartridge filter models RDC-25, RDC-25S, RDC-50, RDC-50S. Rainbow high capacity automatic chlorine/bromine pool and spa feeder models HC-3315, HC-3330, HC-3340. Also compatible with Pentair Dynamic RCF-RTL series cartridge filter chlorine/bromine dispensers.
• Identical in Form, Fit, and Function to OEM Specification
• American Owned and Operated Business. Part is Made and Packaged in the US.
• Pressure relief knob oring R172221 for Pentair Rainbow pressure filter lid fits FIL11300100 and 172385a pressure filter lids