HPI WB8DD 12" x 96" Double Water Tube Pool Cover Weight
HPI WB8DD 12" x 96" Double Water Tube Pool Cover Weight
Keep your pool winter cover snug with the Hinsperger 12" x 96" Double Water Bag. The Blue (WB8DD) water bag adds reliable weight along your cover’s edge. Therefore, it prevents shifting, wind uplift, and water intrusion. Additionally, its double-chamber construction fills easily and distributes water evenly for balanced tension.
What Does the Hinsperger WB8DD Water Bag Do?
The WB8DD durable double-chamber “water tube” weights down winter pool covers more effectively than single-chamber tubes. Its patented intermittent center seals allow water to flow between chambers from a single fill valve. Specifically, the water bag ensures even weight distribution and a secure cover fit.

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Key Features
- Double-chamber design: Single valve fills both chambers
- Heavy-duty vinyl: Thick, UV-treated material resists punctures, weathering, and freeze-crack damage
- Easy to fill and position: Large, reinforced fill/drain valve accepts a standard garden hose and seals tight
- Sized right for perimeter weighting: At 12″ wide and 96″ long, it’s ideal for medium to large pool cover edges or as part of a system of water bags.
- Classic blue finish: Blends with pool covers and gives a clean, finished look
Technical Specifications
- Dimensions: 12 in. (W) × 96 in. (L)
- Color: Blue
- Construction: Double-chamber, heavy-gauge vinyl
- Use Case: Pool winter cover weight for in-ground and above-ground pools
Specs
- Part Number: WB8DD
- Manufacturer: HPI
How to achieve the best results using the WB8DD double water bag?
For best results, slide the water bag under the winter cover along the pool edge. Make sure to do this before filling. Next, finish filling via garden hose until both chambers are fully weighted. Space bags evenly and every 2–3 feet. It is important to maintain consistent tension and reduce cover sag. Before spring pool opening, drain and store bags in a dry place to extend their life.
If you want to understand more about the importance of using a winter cover? Checkout our article Do You have to Cover a Pool in the Winter as we go through why and why not.
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FAQ
Our expert staff answers customer's most asked questions.
How long should a winter pool cover last?
The lifespan of a winter pool cover depends on material quality, UV resistance, and how well it’s maintained. Heavy-duty woven polyethylene covers with UV inhibitors can last many seasons. Investing in a higher-quality cover often reduces replacement costs over time.
How do I choose the right size winter pool cover for my pool?
Your winter cover should match your pool’s shape and be slightly larger than the pool’s actual dimensions. For above-ground pools, this extra material is called the overlap and allows the cover to secure over the top rails.
Do I really need a winter pool cover?
Yes, using a winter pool cover is one of the best ways to protect your pool during the off-season. A quality cover keeps out leaves, dirt, and debris and limits sunlight exposure that causes algae growth.
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