Waterway Sand Filter Drain O-Ring | 805-0224
Waterway
SKU: 805-0224
Waterway 805-0224 Union / Tailpiece O-Ring (For 1-1/2" Waterway Unions)
The Waterway 805-0224 is a replacement union/tailpiece O-ring used to seal many Waterway 1-1/2" union-style connections. It’s commonly found on Waterway gate valve unions and other threaded union/tailpiece fittings where a reliable, serviceable seal is required. Replacing a flattened or cracked O-ring helps stop drips at the union and can prevent suction-side air leaks.
Key Details
- Manufacturer: Waterway
- Part Number: 805-0224
- Part Type: Union / tailpiece O-ring (threaded fitting seal)
- Typical Use: 1-1/2" Waterway union and gate valve union connections
- Color: Black
Common O-Ring Size
- Inside Diameter (ID): 1-3/4"
- Cross Section (Thickness): 1/8"
- Approx. Outside Diameter (OD): ~2"
Common Applications
- Waterway No-Flo 1-1/2" gate valve union seals
- Select Waterway heater tailpiece and union connections (1-1/2")
- Some Waterway filter assemblies that use this O-ring on threaded caps/couplings (model-dependent)
Best practice: confirm fit by matching the part number from your equipment parts list or measuring your existing O-ring before ordering.
What This O-Ring Does
- Seals the union faces to prevent water leaks under pressure.
- Helps prevent air intrusion on suction-side unions that can cause bubbles, noise, or priming issues.
- Maintains an easy-to-service union connection without cutting plumbing.
When to Replace
- Dripping or weeping at a union connection
- Flattened, cracked, swollen, or nicked rubber
- Union must be overtightened to stop a leak
- Union was opened for service and the old seal 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 the groove and mating faces (remove grit, scale, and residue).
- Seat the new O-ring evenly—do not twist it.
- Lightly lubricate with pool-safe silicone lubricant (avoid petroleum-based products).
- Hand-tighten the union nut snugly; overtightening can distort the seal and cause leaks.
- Restart the system and recheck for seepage once the system is running.
Maintenance Tip
If a union still seeps after replacing the O-ring, inspect the union nut and tailpiece for hairline cracks and confirm the plumbing is not putting stress on the union faces. Misalignment can prevent a new seal from seating correctly.
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Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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