Black Polymer Channel with Black Polymer Grate 3 x 3.33 Ft Packs with 1 End Cap & 1 Adaptor. Built in bottom outlets at one end of the trench drain to easily connect 3in sewer & drain pipe, To connect to 4in pipe, a 3in – 4in adaptor is required, available at most hardware outlets. Dimensions 3 x 3.33 Ft L x 5.43in W x 5.39in H. US Trench Drain eliminates standing or pooling water by collecting and redistributing it and keeping exterior areas free from flooding. It can be used on driveways, in garden and landscaped areas, around pools or sporting courts or anywhere around your home or building where water collects. Simply dig a trench and lay product in concrete, sand or crushed stone. Please refer to included instructions with the product for installation and for website details on installation video. We offer numerous accessories to compliment, for the right fit every time. Accessories include corner pieces, tee pieces, end caps, leaf domes, convertors, slim pits and catch basins. We offer finishes in black, terracotta and sandstone polymers, as well as grates in pressed galvanized and stainless steel.