Strainer is the installation equipment which separates dirt, sediments and various foreign substances which may exist in the fluid (cold water, hot water, superheated water and steam) physically thanks to its filter and prevent them to damage other equipment in installation. It is made from cast iron and of flange type. It may be cleaned by removing its cover. Strainers are used to protect equipment such as pumps, water counters and automatic check valves form foreign matters by being mounted on intake side of this equipment.