This is a replacement filter for your Chanson Water Shower Filter. No housing is included. Simply install in your old shower filter housing.Shower filter media life depends on the quality of your source water - the cleaner your water, the longer the filter will last. We have determined that the filter will last approximately 12-18 months for a family of four, using 15,000-20,000 liters in that period. The filter is designed so it does not have to be backflushed, and shower filter media replacement ($34.99, available in our webstore) is easy:Simply unscrew the side body cap, dump out the existing filter, replace with the new filter, and screw the body cap back on.The shower filter body should last for several years if taken care of properly.