If you're building a high-flow pond waterfall box system for a backyard pond, koi pond, or formal water garden, the Extra Large 40" Elite Waterfall Box is the ideal solution. Designed for strength and superior filtration, this box handles flows up to 20,000 GPH and supports pond volumes up to 10,000 gallons.
Premium Pond and Waterfall in a Box System
This heavy-duty waterfall box for pond applications is built for serious performance. Its octagonal design makes it stronger and easier to hide within rock work or landscaping compared to standard rectangular waterfall boxes. Whether you're planning a DIY pond waterfall box build or a professional installation, this unit delivers reliability and flow.
Key Features of This Pond Waterfall Filter Box
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Spillway Width: 40" waterfall for wide, smooth water flow
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Box Dimensions: 35.75" L x 50" W x 30.75" H
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Maximum Pump Flow: 20,000 GPH
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Ideal Pond Size: Up to 10,000 gallons
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Inlets: Two 3" spinweld fittings (bulkheads included)
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Filtration Media: Dual Matala mats for biological filtering
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Warranty: Lifetime warranty from manufacturer
Superior Biological Filtration with Matala Pads
The included Matala filter mats last up to 4x longer than standard foam and provide extensive surface area for beneficial bacteria to grow. This creates a healthy ecosystem for your pond by breaking down excess nutrients and reducing algae growth. A mesh media bag is included for adding optional filter media.
Easy to Install and Versatile
With two 3-inch side spinwelds, you can customize your plumbing setup with ease. One inlet is typically used for the pump line, while the other can be used for a backflush system or to connect additional components. The reversible waterfall snout lets you choose between a traditional or modern look.
What’s Included with This Pond Box Waterfall
- 40" Elite Waterfall Box
- Reversible waterfall weir
- Two Matala biological filter mats
- Mesh media bag
- Two 3" bulkhead fittings
- Stainless steel screws and caps
- Liner clips, silicone, Teflon tape
- Printed installation instructions
Compatible With Pond Waterfall Box Covers
This model is fully compatible with most standard pond waterfall box cover solutions, allowing you to completely hide the unit beneath decorative rock or faux lids. It’s also a great upgrade over smaller models like the Smartpond Black Pond Waterfall Box for those needing more flow and filtration power.
Perfect for DIYers and Pros
- Great for building a DIY pond waterfall box with high GPH pumps
- Trusted by contractors for commercial-grade water features
- Designed to blend into landscaping with minimal visibility
Helpful Tip: How to Install a Pond Waterfall Box
Install this box on a level surface and use the liner clips and included sealant to attach your pond liner securely. Connect your pump line using one of the 3" inlets and adjust water flow as needed. The detachable weir makes maintenance and customization simple.
