For formal water features and commercial installations the Natural Wonders PVC sheer cascade weirs are the best choice for durability and ease of installation.

Heavy duty clear PVC weir with 6" lip creates sheer waterfall and can be poured in concrete or built into pond or walls to create sheer falls in commercial or private settings. The 6" lip can be cut or shaped in the field. Comes with a 1.5" rear entry port for tubing. Requires 60 gallons per hour of flow per inch. Requires the use of clean water, ensure proper filtration of any solids to prevent blockage or uneven flow through the weir.

These Natural Wonders™ Waterfall Weirs can be adjusted from a peaceful clear falling sheet of water to a bold, thundering water feature that adds excitement and style to your pond or water-feature project. The Natural Wonders™ white PVC waterfall weirs can be used in salt and chlorinated water. Water must be filtered to remove particulate.

ALL WEIRS ARE CLEAR PVC WITH A 6" LIP
 

Maximum Weir Heights
If you want a continuous sheer waterfall, the weir should not be placed too high above the surface of the pond or pool or the sheet of water can break up before it hits the surface.
 

• Weirs from 12" to 48" wide: 40" is maximum recommended height of weir above water level to maintain a sheer flowing waterfall effect with no bottom breakup.
• Weirs from 60" to 96" wide: 70" is maximum recommended height of weir above water level to maintain a sheer flowing waterfall effect with no bottom breakup.