Big Blue Water Filter Housings are made of a durable reinforced polypropylene cap and styrene acrylonitrile (SAN) sump and come equipped with 1" NPT inlet and outlet ports. The housings offer flow, performance, and cartridge life and accommodate a wide range of 4.5" x 10" diameter cartridges making them ideal for use in a variety of low-flow applications. The clear sumps are annealed to relieve stress and add clarity and strength. Features: Ideal for a wide range of applications, including residential, commercial, and industrial The cap features mounting bosses for a bracket (not included) Thick walls for increased strength Excellent chemical resistance Heavy duty filter housing ideal for large-capacity, high-flow applications Clear sump housing offers an on-site examination of flow, cartridge life, and performance Pressure relief button for easy cartridge replacement Compatible with any 10" x 4.5" Big Blue or other heavy-duty sediment or carbon filter cartridge Tested and certified by NSF International to NSF /ANSI Standard 42 on material and structural integrity. Applications: Whole house filtration, Reverse Osmosis, residential plumbing, icemakers, misting units, food processing, greenhouses, drip irrigation, wineries, and many more.