EasyPro Just-A-Falls JAF3 18' x 50" Pondless Waterfall Kit – Large DIY Backyard Waterfall System with Basin
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Description
The EasyPro JAF3 Pro-Series Just-A-Falls Kit builds a 50-inch wide, 18-foot long pondless waterfall and stream — one of the most visually impressive DIY water feature sizes available in a single complete kit. The Pro-Series includes everything needed for a professional installation: 45-mil EPDM liner, protective underlayment, 50" spillway, submersible pump, pump vault, check valve assembly, flexible PVC pipe, and WIK installation hardware. No separate component purchases required.
The pondless design recirculates water through an underground reservoir. There is no exposed pond, no standing water, and minimal ongoing maintenance compared to a traditional pond. Water falls over the spillway, travels down the 18-foot stream channel, disappears into the reservoir basin, and is pumped back to the top continuously.
Complete Component List — EasyPro JAF3
- 50" Waterfall Spillway — wide-format spillway creates natural sheet-flow over the falls face
- 45-mil EPDM rubber liner — [LINER DIMENSIONS — VERIFY WITH SUPPLIER] — UV-resistant, fish-safe
- Protective underlayment — non-woven geotextile fabric beneath liner
- Submersible waterfall pump — [PUMP MODEL — VERIFY WITH SUPPLIER] GPH, sized for 50" spillway
- EasyPro JAFV pump vault with access lid — protects pump and provides easy maintenance access
- Check valve assembly — prevents backflow when pump stops
- Flexible PVC pipe — [DIAMETER — VERIFY WITH SUPPLIER] × 25' (confirm length with supplier)
- WIK water installation kit — hardware, fittings, and installation materials
- Instruction manual
Technical Specifications
| Specification | Detail |
|---|---|
| SKU / Model | JAF3 Pro-Series Just-A-Falls Kit |
| Waterfall Type | Pondless (disappearing waterfall and stream) |
| Stream Length | Up to 18 feet |
| Spillway Width | 50 inches |
| Estimated Reservoir Basin | 8' × 10' × 36" deep (estimated finished size) |
| Liner Material | 45-mil fish-safe EPDM rubber |
| Liner Dimensions | 15 x 40 |
| Pump | TM9500 (9500 GPH) submersible pump |
| Pump Vault | EasyPro JAFV with access lid |
| Res-Cubes | Not included |
| Shipping | Truck freight (LTL) — delivery appointment required |
| Origin | Ships from EasyPro, Grant, MI |
| Application | Residential and commercial landscape waterfall installations |
EasyPro Just-A-Falls Kit Series — Choose Your Size
Each size is available in standard (rock-fill reservoir) and HSC (High-Strength Res-Cubes) variants. The HSC variants allow a smaller reservoir footprint with equivalent or greater water storage. Call us to compare: (765) 508-4352.
Why Choose the EasyPro Pro-Series Just-A-Falls?
- Pro-Series grade components. The JAF Pro-Series uses heavier-duty construction than EasyPro's Eco-Series — a larger pump, more robust spillway, and the JAFV vault (designed for larger flow rates). The Pro-Series is appropriate for professional contractor installs as well as experienced DIY builders.
- 50-inch wide spillway creates a dramatic sheet fall. The width of the spillway determines the visual impact of the waterfall face. At 50 inches, the JAF3 produces a genuinely wide, natural-looking cascade — significantly more visual presence than narrower systems. The matched pump is sized to maintain consistent sheet flow across the full spillway width.
- EPDM liner provides decades of leak protection. 45-mil fish-safe EPDM is UV-stabilized, ozone-resistant, and remains flexible in extreme cold. The Pro-Series liner is sized generously to accommodate the full stream channel and reservoir basin with appropriate overlap at the edges.
- Rock or Res-Cube reservoir. The standard JAF3 uses rock-filled reservoir construction (use 6–12" diameter rocks as the base layer, 1–2" stones for the top 6–8" to prevent debris infiltration). The JAF3HSC upgrade includes High-Strength Res-Cubes, which provide 95% void space vs approximately 30% for rock, allowing a smaller excavation footprint with equivalent water storage volume.
- Check valve prevents backflow. When the pump shuts off, the check valve prevents the water in the return pipe from flowing back into the reservoir, keeping it primed for the next startup cycle.
- Complete kit — everything in one order. No sourcing liner, underlayment, pump, vault, and plumbing separately. All components are sized and designed to work together. Warranty coverage from EasyPro on all components.
Frequently Asked Questions
What is included in the EasyPro JAF3 Just-A-Falls Kit?
The JAF3 Pro-Series includes: 50" waterfall spillway, 45-mil EPDM liner (dimensions to be confirmed — contact us before ordering if exact liner size is important for your project), protective underlayment, submersible waterfall pump (model and GPH confirmed at time of order), EasyPro JAFV pump vault with lid, check valve assembly, flexible PVC pipe, WIK installation hardware, and instruction manual.
For the reservoir: the standard JAF3 uses rock fill in the basin (rocks not included). The JAF3HSC variant includes High-Strength Res-Cubes that replace the rock. Confirm which variant you need when ordering. Rocks and boulders for the stream face and basin are not included in either version.
How do Res-Cubes benefit the Just-A-Falls system?
EasyPro's High-Strength Res-Cubes (included in the JAF3HSC variant) are modular structural grid cubes that fill the underground reservoir basin. They provide approximately 95% void space for water storage, compared to approximately 30% when using gravel or rock fill. This means:
- A smaller basin excavation can hold the same or more water volume
- Less digging required for equivalent water storage
- Faster installation compared to sourcing and placing rock
- More liner remains available for the stream channel, enabling a longer stream from the same liner size
If the standard JAF3 (rock fill) fits your project and you have access to rock material, it is a lower-cost approach. If excavation is limited or you want faster installation, the JAF3HSC is the better choice.
What pump is included and how is it sized for the 50" spillway?
The JAF3 includes a specific EasyPro submersible pump matched to the 50-inch spillway width. The pump model and GPH are confirmed at the time of order — contact us at (765) 508-4352 or we can confirm the current pump spec when your order is placed. The pump is designed for 24/7 continuous duty and is sized to maintain consistent, full-width sheet flow across the 50" spillway face at the designed head pressure.
Note: pump GPH requirements scale with spillway width and stream length. The JAF3 pump is matched specifically for this 50" / 18-foot configuration. Using a non-matched pump of different GPH may result in inadequate coverage across the spillway width or excessive turbulence.
How large does the reservoir basin need to be?
The estimated finished reservoir basin size for the JAF3 is approximately 8 feet × 10 feet × 36 inches deep. This is the excavation footprint needed for the underground water storage area at the base of the waterfall. The liner extends from this reservoir basin up and along the stream channel, over the spillway, and back down behind the falls face.
Important: the reservoir must hold enough water to keep the pump submerged and the stream running without exposing the pump. Auto-fill valves (sold separately) are recommended to automatically top off water lost to evaporation, splash, and plant uptake.
Can I customize the shape and path of the 18-foot stream?
Yes. The 18-foot dimension is the stream length, not a fixed straight path. The 45-mil EPDM liner is flexible and can be folded, draped, and overlapped to accommodate curves, multiple drop points, and irregular terrain. You can design the stream path with natural-looking curves, small waterfalls within the stream channel, flat sections for pool areas, and steeper drops for cascade effects. Use boulders and smaller stones set within the liner to create the rock work.
EasyPro publishes detailed installation guides for the Pro-Series JAF kits, available at easypro.com. For complex or sloped sites, call us before ordering to confirm the JAF3 is the right size: (765) 508-4352.
What are the maintenance requirements?
Maintenance for a Just-A-Falls system is significantly lower than a traditional pond:
- Top off water periodically (or install an auto-fill valve) — water is lost to evaporation, splash, and plant uptake
- Clear the pump vault intake if leaves or debris accumulate — typically a few times per season
- Clean pump intake screen annually or as needed to maintain flow rate
- Remove winter debris from the stream channel before spring startup
Because there is no open water body, there is no place for string algae to establish and no fish to maintain. The pondless design is one of the lowest-maintenance water feature formats available.
Is the 45-mil EPDM liner durable enough for large boulders and commercial use?
Yes. 45-mil EPDM is the industry standard liner specification for Pro-Series waterfall kits. It is UV-stabilized, highly puncture-resistant, ozone-resistant, and remains flexible in sub-freezing temperatures. When installed with the included non-woven geotextile underlayment, the liner is protected from sharp rocks or roots underneath. The underlayment is placed first in the excavation; the liner drapes over it.
For professional contractor installations with very heavy boulders (over 300 lbs), additional geotextile padding beneath and between large rocks at contact points provides extra protection.
What is the warranty on EasyPro JAF3 components?
EasyPro offers manufacturer warranties on all JAF Pro-Series components. Specific warranty terms by component:
- Pump: Warranty confirmed at time of order with pump model specification
- EPDM liner: EasyPro's DuraLiner EPDM carries a 20-year warranty against defects
- Spillway and vault: Standard EasyPro limited warranty on all molded components
Warranty coverage requires installation per EasyPro's specifications. Questions about warranty terms? Call us: (765) 508-4352.
Why Buy from Pond Pro Direct?
- Authorized EasyPro dealer — full manufacturer warranty support.
- We carry the full Just-A-Falls lineup — JAF8W (8ft), JAF16W (16ft with Res-Cubes), JAF3/JAF3HSC (18ft), JAF4/JAF4HSC (30ft). Call us to find the right size for your project: (765) 508-4352.
- Freight shipping assistance — we'll coordinate your delivery appointment and walk you through what to inspect on arrival.
- Price Match Guarantee — found a lower price from an authorized EasyPro dealer? We'll beat it by $50 on orders over $2,000.
- 30-Day Return Period. Call or text (765) 508-4352, Monday–Friday, 9 AM–5 PM EST.
The EasyPro JAF3 delivers 18 feet of pondless stream with a 50-inch wide waterfall face — one of the most visually striking DIY water feature sizes available in a complete kit. Every structural component is included: liner, underlayment, spillway, pump, vault, check valve, and WIK installation hardware.
Questions about site sizing, comparing JAF3 vs JAF3HSC (Res-Cubes), or confirming pump GPH for your head pressure? Call or text (765) 508-4352 — Monday through Friday, 9 AM to 5 PM EST.
Price Match
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