Shop for a range of Plumbing Wastes & Traps with Trade Plumbing Supplies. Plumbing traps are curved bending pipes which can be found underneath plumbing applications. Designed to hold a small amount of water which then works to prevent harmful sewer gases and bacteria entering a room or building, while also allowing wastes to pass through. They are also designed to prevent blockages passing into a drainage system. Plumbing wastes are required for all sinks, baths and basins as they act as an exit for water by connecting to the pipe work below. The expansive range of wastes is available in varying styles which are simple to install and maintain. As the required size can differ depending on the installation it's important to choose the right type according to the room or project. Waste plumbing should also help keeping the overall system clear of anything that could cause a blockage.