This Pentek 150111 3/4" #20 High Temperature red filter housing is suitable for many industrial applications. It is made of glass-reinforced nylon for strength and resistance to chemicals and high temperatures. The head has 3/4" female National Pipe Thread Taper (NPT) threaded input and output connections, and a silicone O-ring provides a dependable seal. The housing can be used with standard 20" x 2-1/2" filter cartridges (sold separately). It has an initial pressure drop of less than 1 pound per square inch (psi) at a flow rate of 8 gallons per minute (gpm), a maximum operating pressure of 125 psi, and a maximum operating temperature of 165 degrees F (73.9 degrees C). This filter housing is used in a wide variety of industrial applications, including those involving organic solvents, sea water, alcohol, petroleum and vegetable oils. Specifications Filter cartridge size (H x W) (sold separately) 20 x 2-1/2 inches (508 x 63.5 mm) Initial pressure drop at 8 gpm 1 psi Maximum temperature 165 degrees F (73.9 degrees C) Maximum pressure 125 psi Maximum dimensions (H x W) 22-1/4 x 5-1/8 inches (308 x 130 mm) H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back. Water filters remove undesirable particles, chemicals, and microorganisms from water by means of a semipermeable barrier, adsorption, or biological processes. They are made of densely packed synthetic or natural fibers that trap suspended particles, materials that block microbes or adsorb unwanted chemicals, or substances that cause a chemical change, such as acid neutralization. For most residential, commercial, and industrial applications, water filters are manufactured in the form of replaceable cartridges that fit inside permanent housings. Filtration systems typically consist of a series of two or more types of filters, each designed to remove different contaminants. The performance of filters is measured by the minimum particle size that is blocked, the percentage of particles or microorganisms that are removed, the downstream concentration of unwanted chemicals, the maximum flow rate, and the amount of water that can be filtered before the filter must be replaced. Water filters are used in a wide range of applications, including drinking water purification, swimming pools, industrial processes, and irrigation, among others. Pentair manufactures industrial, commercial, and residential water filtration components and systems. The company, founded in 1966 and headquartered in Minneapolis, MN, meets International Organization for Standardization (ISO) standards 9001 and 14001 for quality assurance.