Atlantic's immensely strong Fastfalls set the standard in spillways, with an internal baffle system stabilized by support cones that cannot be crushed. Spillway boxes diffuse incoming water flow to create the starting point of Pond-free streams and falls Atlantic FastFalls are designed to make plumbing the top of the waterfall as easy as possible Innovative rear liner attachment simplifies installation and eliminates leakage due to settling Crush-proof design with internal baffles stabilized by support cones carries the weight of the largest rock and stone Reinforced spillway lip retains rock, gravel, mulch or soil and can be planted to blend seamlessly into the surrounding landscape FastFalls includes installation kit, male thread adapter and one-piece liner flange Description Spillway Width (Inch) Inlet (Inch) Max Flow (GPH) Dimension (W X D X H) SP1600 16" 1-1/2" FPT 3,000 16-1/2" X 9-1/2" X 7-1/2" SP1900 19" 2" FPT 4,000 20-1/2" X 17" X 10-1/2" SP2600 26" 2" FPT 6,000 27-1/2" X 17" X 10-1/2" SP3800 38" 3" FPT 9,000 39-1/2" X 17" X 10-1/2"