HPI YARD GUARD BLOC MESH 99 Safety Cover
Best safety cover for rectangular pool owners seeking algae-free winter maintenance.
Safeguard your 20' x 40' rectangular pool with the HPI Yard Guard BLOC Mesh 99 safety cover. This durable cover is crafted from high-strength polyethylene mesh, blocking 99% of sunlight to prevent algae growth. It features double-sided webbing on all seams for exceptional strength and rub strips to protect your pool's coping. Marine-grade stitching ensures longevity, and all necessary brass hardware is included for a secure installation. Enjoy enhanced safety and peace of mind with this reliable pool cover.
$649.98
Owner Satisfaction
4.7
/ 5
Category Rank
15
/ 1122
#15 in Pool Covers & Ground Cloths
Price vs Category Average
+30%
Above average
Pool Size Compatibility
2040
/ ' x ' Rectangular
Who it's for
- Parents and pet owners prioritizing maximum backyard safety
- Pool owners wanting less algae and easier spring maintenance
- Homeowners seeking long-term value in harsh winter climates
Who should skip it
- Budget-conscious buyers preferring lower upfront costs
- DIY enthusiasts avoiding permanent deck modifications or heavy lifting
- Residents in regions prone to heavy, rapid rainfall
Performance breakdown
Algae Prevention
Blocking 99% of sunlight effectively starves algae of its growth requirements.
Structural Integrity
High burst strength and reinforced webbing provide exceptional resistance against heavy loads.
Drainage Efficiency
Porous mesh design allows water to pass through while filtering out debris.
Installation Complexity
Requires significant effort and precise anchoring for a secure, safe fit.
Material Durability
Marine-grade stitching and heavy-duty polyethylene ensure long-term resilience against the elements.
Coping Protection
Integrated rub strips prevent abrasive wear on your pool's finished edges.
Key Specs
Pool Size Compatibility
20' x 40' Rectangular
Material Thickness
18 Mil
Weight
7.1 Oz./yd2
Scrim Count
58 x 48
Burst Rate
650 PSI
Flow Rate
7 GPM
Warranty
12 Year
Step Configuration
Universal Right Step (4' x 12' section)
Features
- Blocks 99% of sunlight to inhibit algae growth
- Double-sided webbing reinforces all seams
- Rub strips protect pool coping from wear
- Porous mesh allows for efficient water drainage
- Universal Right Step accommodates various sizes
- High burst strength rating ensures safety
- Marine-grade triple line stitching for durability
- Includes all necessary brass hardware
What customers say
Customers highly value the HPI YARD GUARD BLOC MESH 99 for its superior quality and reliability. The proprietary mesh excels at filtering fine debris while allowing necessary water drainage, resulting in remarkably clean pools at opening time. A key benefit is the high UV blockage, which effectively prevents algae growth throughout the off season. Although the initial cost is premium, owners find the long term durability and robust construction justify the investment. Users appreciate that the cover withstands harsh weather and heavy snow loads season after season. While slightly heavier than lighter options, this is seen as a necessary trade off for exceptional strength and safety. Overall, satisfaction is high for this durable, essential pool upgrade.
Know before you buy
No, the HPI Yard Guard BLOC Mesh 99 is a porous mesh cover that allows rainwater to drain directly through the material. This eliminates the need for a cover pump and prevents the accumulation of heavy water weight on the surface.
Yes, the mesh is specifically engineered to block 99% of sunlight. By significantly reducing light penetration, it effectively inhibits the photosynthesis required for algae to thrive.
The cover is equipped with integrated rub strips along the underside. These strips act as a buffer between the abrasive mesh material and your pool's coping, preventing wear and tear during installation and seasonal movement.
This model includes a Universal Right Step section measuring 4' x 12'. It is designed to accommodate standard rectangular in-ground pools with steps located on the right side.
The 650 PSI burst rating indicates the high-strength capacity of the polyethylene material. This ensures the cover can withstand significant weight, such as heavy snow or accidental foot traffic, providing a reliable safety barrier.
Yes, the package comes complete with all required brass hardware. You will have the necessary anchors, springs, and installation tools to secure the cover properly to your pool deck.
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