Swimline 18' Round A/G Overlap Liner 48-52" Wall, Solid Blue | 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.