The Sheer Descent Waterfall is an elegant and low-flow water feature that adds a dramatic touch to your pool area. One of its key advantages is its ability to create a continuous sheet of water with minimal flow, offering an efficient and aesthetically pleasing experience.
This guide provides all the technical specifications and installation details you need for setting up your Sheer Descent Waterfall.
Water Flow Requirements for Sheer Descent Waterfall
The water flow requirement is relatively low for a standard Sheer Descent Waterfall. For instance, a four-foot unit typically requires only 40 U.S. gallons per minute (GPM) to operate effectively.
The general rule of thumb is that the waterfall needs approximately 10 GPM per foot, ensuring minimal head loss during operation.
To determine the appropriate pump for your installation, consult the Water Flow Requirement Chart. Typically, a standard pool pump is sufficient to run the Sheer Descent Waterfall and filter the pool without significant loss of water turnover
However, a higher water gallonage may be used to project the waterfall further from the wall for more dramatic effects.
Hydraulic Guideline Chart
(Typical Pump Performance at 50 Feet of Head)
| Pump Size | Flow (GPM) |
| 1/2 HP | 26 GPM |
| 3/4 HP | 58 GPM |
| 1 HP | 68 GPM |
| 1 1/2 HP | 93 GPM |
| 2 HP | 106 GPM |
| 3 HP | 140 GPM |
Pipe Sizing
The plumbing requirements for your Sheer Descent Waterfall depend on the size of the waterfall and its water flow needs:
- Minimum pipe size: 1 1/2″ pipe
- For units over 60 feet in length or waterfalls over 5 feet: Use a minimum of 2″ pipe.
- For maximum flow rates:
- 1 1/2″ pipe: up to 60 GPM
- 2″ pipe: up to 100 GPM
- 2 1/2″ pipe: up to 140 GPM
- 3″ pipe: up to 225 GPM
Waterfall Height and Width Specifications
When installing the Sheer Descent Waterfall, it’s essential to follow these height and width guidelines for optimal performance:
- Waterfall height: The recommended height from the lip of the Sheer Descent fixture to the pool water surface is crucial for a smooth, cascading effect.
- Width of the sheet of water: The sheet of water at the pool’s surface naturally narrows as it falls, and the width at the pool’s surface depends on the waterfall’s height.
For larger installations or multiple waterfalls, you may need to calculate the total water flow required based on the combined length of all units. For instance, two 6-foot waterfalls would require 120 GPM (60 GPM per 6-foot unit).
Installation of Sheer Descent Waterfall
There are two primary methods of plumbing for the Sheer Descent Waterfall: using your existing pool filter pump or installing a separate pump dedicated to the waterfall.
Existing Pool Filter Pump Installation
This is the most common installation method, as the Sheer Descent Waterfall system is designed for low water flow. Here’s how to install it:
- Plumbing: Install a three-way valve on the return line after the filter.
- Pipe Size: Use a minimum of 1 1/2″ PVC schedule 40 pipe for the waterfall feed line.
- For larger units (over 5 feet in length), use a minimum of 2″ pipe.
Separate Pump Installation
If you’re installing multiple waterfalls or a unit that is 6 feet or longer, you may want to use a dedicated pump. Follow these steps:
- Separate Suction Line: Install a separate suction line to the pool, using a minimum of 2″ schedule 40 pipe.
- Anti-Vortex Safety: Ensure an anti-Vortex safety suction cover is installed at the poolside, at least 18 inches above the pool floor.
- Sheer Descent Filter/Strainer: Install a Sheer Descent filter/strainer (part #3456) on the return line between the pump and the waterfall to keep large debris from entering the unit.
- Balancing Water Flow: Install a return line with a three-way valve to balance the flow between the Sheer Descent Waterfall and the pool return line.
Sheer Descent Waterfall Customization and Radius Cuts
Sheer Descent Waterfalls can be customized to fit specific pool designs. For instance, the extended lip models can be cut to create curves, irregular shapes, and more. Keep the following in mind when making custom cuts:
- Extended Lip Cutting: Only remove a maximum of 4 1/2″ of the extended lip, leaving at least 1 1/2″ for tile installation.
- Super Radius Models: For very tight curves, consider using super radius models, which can accommodate sharp curves, available by special order.
Important Note: Always measure carefully and leave room for tile and thin-set installation when cutting the waterfall. Protect the fall from construction debris by replacing the protective tongue after cutting.
Suggestion
Installing a Sheer Descent Waterfall requires careful planning, the right equipment, and proper plumbing to ensure optimal performance. Whether you are using your existing pool pump or a dedicated pump for multiple units.
It’s crucial to adhere to the specified water flow, pipe sizes, and safety measures. By following these guidelines, you can create a stunning and functional water feature for your pool area that enhances its beauty and provides a relaxing atmosphere.
With these detailed installation instructions, you’re well on your way to achieving a successful Sheer Descent Waterfall setup for your pool.