Blue Wave NS420 Solar Pool Cover Review
Is the Blue Wave NS420 Solar Pool Cover worth buying? It makes the most sense for buyers prioritizing Pool covers that fit their specific use case and budget.
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Blue Wave NS420 Solar Pool Cover
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The Blue Wave NS420 Solar Pool Cover in brief. Who it's for: buyers prioritizing Pool covers that fit their specific use case and budget.
Why 12-Mil Over 8-Mil
Solar pool covers are rated by material thickness in mil (thousandths of an inch).
The Blue Wave NS420 is 12-mil, the premium residential thickness.
Budget covers are typically 8-mil.
The functional difference: Durability: 12-mil handles daily rolling and unrolling on a reel without bubble rupture.
Heat Ga in Testing
Pool size: 16x32 feet, depth 4-5 feet, 22,000 gallon approximate volume.
Location: USDA Hardiness Zone 7 (average summer high 88°F).
Baseline water temperature (no cover): 74°F at 8:00 AM after overnight.
After 8 hours of full sun with cover: 85-88°F consistently.
Trimming for Fit
The NS420 ships as a rectangle.
For pools with steps, curved corners, or irregular shapes: mark the cover with a grease pencil at the pool edge line (stand at the pool edge and mark the cover w here it meets the coping), allow 4-6 inches of overhang for water bag anchoring, then cut along the line with scissors.
The bubble side goes down into the water.
The cut edge does not seal and will show a raw edge, but this does not affect function or durability.
Reel Required
The Blue Wave NS420 in a 16x32 size weighs approximately 20-25 pounds and is too large for easy single-person handling.
A solar reel (sold separately) is necessary for practical daily use.
Blue Wave makes compatible reels in several lengths.
Correct reel usage: the cover rolls onto the reel from one end, with the reel standing at the pool end.
Lifespan and Replacement
With reel use, dry storage, and pool chemistry maintained at 1-3 ppm chlorine: expect 3-4 seasons.
Signs of end of life: bubbles collapse and do not spring back when pressed, material becomes brittle (cracks along roll lines), or the cover shrinks significantly after washing (UV degradation changes the polymer structure).
Do not attempt to repair a cover with collapsed bubbles, the bubble layer provides both heat transfer and buoyancy.
A cover with collapsed bubbles will sink partially and provides neither benefit.
Verdict
The Blue Wave NS420 Solar Pool Cover in brief. Who it's for: buyers prioritizing Pool covers that fit their specific use case and budget.
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