Waterway Crystal Water Cartridge Filter 2-1/2" Union O-Ring | 805-0232
Waterway
SKU: 805-0232
Waterway 805-0232 O-Ring for 2-1/2" Union / Tailpiece Connections
The Waterway 805-0232 is a replacement union O-ring used on many Waterway 2-1/2" union and tailpiece connections found on pool and spa equipment (including select pump unions, heater tailpieces, and Waterway Crystal Water filter bulkhead unions). Replacing a worn O-ring helps stop drips at the union, prevents suction-side air leaks, and restores a reliable seal after service.
Key Details
- Manufacturer: Waterway
- Part Number: 805-0232
- Application: 2-1/2" union / tailpiece O-ring (Waterway-style union sealing ring)
- Common Use Areas: Pump unions, heater union tailpieces, and select Waterway filter bulkhead unions (model-dependent)
O-Ring Size (Commonly Listed)
- Inside Diameter (ID): 2-3/4"
- Cross Section (Thickness): 1/8"
Where This O-Ring Is Commonly Used
- Waterway 2-1/2" pump union connections
- Waterway 2-1/2" heater union tailpiece connections
- Select Waterway Crystal Water cartridge / D.E. filter bulkhead union connections (verify by filter model and union style)
What This Part Does
- Seals the union connection between mating faces to prevent water leaks.
- Helps prevent suction-side air intrusion that can cause bubbles, noise, or priming issues.
- Maintains a service-friendly union so equipment can be removed without cutting plumbing.
When to Replace
- Dripping or weeping at the union connection
- Flattened, cracked, swollen, or nicked O-ring
- Union must be overtightened to stop a leak
- Union was opened for service and the old O-ring no longer reseals reliably
Installation Notes
- Turn the pump off and relieve system pressure before opening the union.
- Remove the old O-ring and clean both sealing faces (remove grit, scale, and old residue).
- Seat the new O-ring evenly in the groove; do not twist or pinch.
- Lightly lubricate with pool-safe silicone lubricant (avoid petroleum-based lubricants).
- Hand-tighten the union nut snugly; overtightening can distort the seal and cause leaks.
- Restart the system and recheck for seepage once full flow/pressure is restored.
Maintenance Tip
Many “bad O-ring” leaks are actually caused by debris on the union faces. If a union drips, clean the sealing surfaces first and inspect for hairline cracks in the union nut or tailpiece before replacing larger parts.
Related Products (Aqua Pool Supply)
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.
Related Products
