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 oth- er equipment in installation. It is made from cast iron and of flange type. It may be cleaned by removing its drain cock on cover. Strainers are used to protect equipment such as pumps; water counters and automatic check valves form foreign mat- ters by being mounted on intake side of this equipment.