Pump sizes from 2000 to 8,000 gph. Waterfall Tank dimensions: 28" W x 17" D x 20" H. Fitted with 1 1/4" FPT inlet.* See options available below. Designed to be buried within a waterfall; can be surrounded by bricks or rocks these tanks create a uniform sheet of water for even flow throughout the waterfall and they help avoid common leakage problems. The aluminum Angle is bolted to the housing via molded in T nuts. It's the perfect way to attach a pond liner for leak free operation. *Units come with a 1.25" Double threaded Bulk head fitting as indicated and requires a hose adapter which is not included because we have no way of knowing what tubing you might use. We can drill the unit out for a larger fitting and include tubing hose adapter for additional charge as listed below. When used with No Clog Media, a waterfall tank acts as a bio filter that will seldom need cleaning except to drain off sediment. See related items below: *You will need (2) PVC15