Description
Swimline HydroTools RipStopper Winter Pool Cover – 21 ft Round Above Ground (RIG21)
The Swimline HydroTools RipStopper RIG21 is a heavy-duty solid winter cover made for 21 ft round above-ground pools. Its tightly woven, rip-resistant polyethylene construction helps keep leaves, dirt, and winter debris out of the pool while reducing spring cleanup.
Key Features
- Fits: 21 ft round above-ground pools
- Solid cover helps block sunlight and keep debris out
- RipStopper woven polyethylene fabric for improved tear resistance
- UV-resistant material for better weather durability
- Reinforced grommets around the perimeter for secure tie-down
- Includes a cable and winch/tensioner for typical installation
Specifications
- Manufacturer: Swimline / HydroTools
- Part Number: RIG21
- Pool Shape: Round
- Pool Size: 21 ft
- Cover Size (Actual): 25 ft (provides approximately 4 ft overlap)
- Material: Woven polyethylene (rip-resistant construction)
- Color: Green / Black
What’s Included
- (1) RipStopper winter pool cover
- (1) Cable
- (1) Cable tightening device (winch/tensioner style)
Installation Notes
- Center the cover so overlap is even around the pool.
- Thread the cable through the grommets and tighten evenly so the cover sits snug against the pool wall.
- Use cover clips (optional) for added security in windy areas.
- Use a cover pump if significant rain water accumulation is expected.
Care & Storage
- Remove standing water and heavy debris to reduce stress on the cover and grommets.
- Avoid sharp objects and store chemicals away from the cover material.
- Rinse and fully dry the cover before folding and storing for the off-season.
Related Products
- Winter Cover Pumps
- Above Ground Cover Clips
- Pool Closing Kits
- Above Ground Pool Air Pillows
- Cover Patch Kits
- Winterizing Plugs
Maintenance Tips
- Check cable tension periodically through the season and re-tighten after major storms as needed.
- Remove heavy leaf piles to prevent excess load and premature wear.
- If rubbing occurs at the top rail, add protective padding to reduce abrasion.
- Replace the cover if you notice widespread thinning, seam separation, or grommet tearing.









