Swimline 18' Round A/G Overlap Liner 48-52" Wall, Solid Blue | LI184820
Swimline
SKU: LI184820
Swimline LI184820 Above Ground Pool Liner – 18 ft Round Overlap, Solid Blue, 20 Gauge (Fits 48"–52" Wall)
The Swimline LI184820 is a durable overlap-style vinyl pool liner designed for 18 ft round above-ground pools with standard 48"–52" wall height. This liner features a classic solid blue look and uses a 20 gauge (standard heavy-duty) vinyl construction to help stand up to seasonal use, pool chemicals, and sun exposure when properly maintained.
Key Features
- Pool fit: 18 ft round above-ground pools
- Wall height: Fits most 48"–52" walls (commonly used on many standard above-ground pools)
- Installation style: Overlap (liner drapes over the wall and is secured with coping strips)
- Color / pattern: Solid Blue
- Material: Virgin vinyl construction designed for chemical and UV exposure
- Seams: Heat-welded seam construction for strength and leak resistance
- Cold-weather performance: Built for flexibility and improved cold-crack resistance when installed correctly
Specifications
- Brand: Swimline
- Part Number: LI184820
- Pool Type: Above Ground
- Pool Shape: Round
- Pool Size: 18 ft
- Wall Height Compatibility: 48"–52" (verify before ordering)
- Thickness: 20 gauge (standard heavy-duty)
- Warranty: Limited / prorated (terms vary by seller and policy)
Overlap Liner Installation Notes
- Coping strips required: Overlap liners must be clamped at the top rail with coping strips (not a bead receiver track).
- Confirm wall height: Measure from the bottom track to the top of the wall. If your pool is taller than 52", verify fit before ordering.
- Use a liner pad & cove: A floor pad and foam cove can help protect the liner and improve the finished fit.
- Prep matters: A level base and smooth floor are critical to reduce wrinkles and puncture risk.
Best For
- Replacing a worn, leaking, or faded liner on an 18' round above-ground pool
- Owners who want a straightforward overlap install (no bead track required)
- Classic solid-blue look for a clean, simple pool appearance
Related Products
- 18' Round Liner Pads
- Overlap Liner Coping Strips
- Above Ground Liner Lock / Wedge
- Foam Cove for Above Ground Pools
- Above Ground Skimmer & Return Gaskets
- Vinyl Liner Patch Kits
Maintenance Tips
- Keep water chemistry balanced (especially pH and chlorine) to help prevent fading, brittleness, and premature wear.
- Avoid letting the pool sit empty—liners can shrink, shift, or wrinkle without water support.
- Brush and vacuum routinely to reduce staining and keep debris from grinding into the liner floor.
- When winterizing, use a properly fitted cover and remove heavy debris to reduce stress on the liner and pool structure.
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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