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: 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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