Pentair High Capacity Chlorinator Lid to Housing O-Ring | R172240
Pentair
SKU: R172240Z
Pentair Rainbow High Capacity Feeder Lid-to-Housing O-Ring | R172240
The Pentair R172240 is the replacement lid-to-housing O-ring used on Pentair Rainbow High Capacity automatic chlorine/bromine feeders. This seal sits between the feeder lid and the feeder housing to help prevent water leaks and air intrusion that can cause inconsistent feeder operation.
Compatibility
- Fits: Pentair Rainbow High Capacity feeders: HC-3315, HC-3330, HC-3340
- Used anywhere the feeder parts diagram calls for the R172240 lid O-ring
Key Features
- Restores a tight lid seal between the feeder lid and body
- Helps prevent leaks caused by flattened, swollen, or cracked O-rings
- Reduces air leaks that can affect flow through the feeder
- Direct replacement for routine maintenance or after lid service
Specifications
- Brand: Pentair / Rainbow
- Part Number: R172240
- Part Type: Lid-to-housing O-ring
- Quantity: Sold individually
- Common cross-reference: often listed as O-330 / AS568-360 (varies by supplier listing)
Common Signs It Needs Replacement
- Water seepage around the feeder lid
- Lid is difficult to seal evenly (O-ring flattened or swollen)
- Visible cracking, nicks, or brittleness
- Feeder output becomes inconsistent after opening/refilling the unit
Installation Notes
- Shut off the pump and relieve system pressure before opening the feeder.
- Remove the lid and lift out the old O-ring.
- Clean the O-ring groove and lid sealing surface (remove scale and debris).
- Lightly lubricate the new O-ring with a silicone-based lubricant and seat it evenly without twisting.
- Reinstall the lid, tighten evenly, restart the system, and check for leaks.
Related Products
- Search Aqua Pool Supply for R172240
- Silicone Lubricant for O-rings and seals (R172036Z)
- HC Series Hose Bib / Drain Valve (R175009)
- HC Series Control Valve (R172439)
- HC-3315 feeder parts
- HC-3330 feeder parts
- HC-3340 feeder parts
Maintenance Tips
- Clean and lightly lubricate the lid O-ring each time you open the feeder to reduce pinching and extend seal life.
- Avoid over-tightening the lid—excess force can distort sealing surfaces and shorten O-ring life.
- Keep water chemistry balanced; high pH and high calcium can accelerate scaling around the lid seal.
- If the feeder is in a freeze-prone area, winterize properly to prevent cracked housings and damaged seals.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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