A strainer is a pipe fitting with an attached metal, mesh, or wedge wire strainer that strains and filters liquid and separates it from solid matter. By catching solids at specific places in the pipeline, unwanted debris cannot move further down the line where they might damage a valve or cause other harmful effects.

Strainer valves are plumbing equipment that filters foreign matter in pipelines. Strainers have a wide range of uses and are indispensable for the health and safety of the system they are used. These valves ensure a healthy and long-lasting operation of many equipments such as pumps, water meters, and control valves.