Description EasyPro Eco-Series Waterfall Diffusers Made to last and faster to install than any other spillway on the market! A fast and easy way to create professional looking waterfalls Ideal for use at beginning of streams and in block walls, pools and formal fountains Extra strong vertical rib design creates a nearly indestructible diffuser Waterfall Diffuser Instruction Manual Waterfall Diffuser Video 16" UWD16 Low profile design of 3 1/2" makes them easy to conceal Load bearing design allows block to be stacked directly onto diffusers Units have dual 2" inlets Dimensions 3.5" Profile, 16" Width Inlet Dual 2" FPT Inlets Recommended Flow Rate 1000 - 4000 gph 23" UWD23 23" wide - can be used in multiples for wider applications Recommended flow rate of 25 to 100 GPM Dual 2" inlets Measures 23" wide x 14" deep x 31/2" tall Dimensions 23" W x 14" D x 3 1/2" T Inlet Two 2" fpt spinweld Recommended Flow Rate 1500-6000 gph