Siemens Water Technologies offers a variety of filter cartridge replacements and housings to meet specific configurations and filtration needs. This single tube housing accommodates 10", 20" and 30" Code F filter cartridges. The inlet and outlet are 3/4" NPT, and the bowl of each housing is fitted with a 1/4" NPT drain plug. Inlet and outlet connections are made to the housing head, allowing cartridges to be replaced without disconnecting the inlet/outlet piping