Compact RV/Condo Total Filtration KDF55. Removes chlorine, heavy metals and contaminants. Emits an electro-magnetic field that eliminates bacteria, algae and mold. GAC removes chlorine, heavy metals, organics, chemicals and pesticides. KDF reduces the load on the carbon, increasing useful life up to 10 times. Magnetic Filter prevents scaling on plumbing and appliances, and conditions the water. Automatically backwashes out accumulated contaminants programmed intervals. No Maintenance required. Controls have a self check capability. Control head will store parameters of programming for up to a year in case of an electrical outage. Perfect for R.V's. Cabins. Condo's and apartments where you cannot install a whole house system, With all the features of a whole house filter. 1/2" IN AND OUT MPT SIZE 23" X 10"