Filter Housing, 1 in. NPT, BlueMfr #: HD 950A Heavy Duty Whole House Water Filter Housing: This filter system makes sure your family has clean, fresh water supply throughout the house by reducing sediment, dirt, sand, and silt from incoming water supply; Note: Filter cartridge sold separately Easy to Install: Featuring 1" inlet outlet and built in pressure relief button, system includes housing wrench; Four times the capacity of standard duty filters Filtered Water At Home: Ideal