A U-shaped conduit under a sink or other fixture is known as a drain trap. Its function is to collect water so that sewer gases cannot penetrate the house. Additionally, the trap offers a water seal to stop sewer gases from fleeing into the environment. When a sink drains, a plumbing drain trap is intended to catch a tiny quantity of water. Sewer gases cannot escape the trap and enter your house because of the water that collects at the bottom of the curved portion of the trap. It is made up of stainless steel and modern technology.