Strainers are placed in-line with process piping to remove large solid contaminants from the flow. Strainers can be cleaned and reused. Strainers can be supplied as either an assembly or an element. Strainer assemblies come equipped with a housing, cover or case, and a strainer element. Strainer elements, when sold separately, do not come as a complete assembly. A strainer element is a simple mesh or perforated metal element that may be used as replacement or a handheld strainer. Strainers can be used in a wide variety of applications, including but not limited to: general purpose, chemical, coolant, food processing, laboratory, industrial, high temperature, high viscosity, hydraulic fluid, medical or pharmaceutical, oil or fuel, refrigerant and water.