Attaches right to the garden hose when filling the pool/spa or you can install inline. Kit contains: 1 - 10" Pre-Filter housing with pressure release (#CAR150067), 2 - 10" 1 Micron Filter (#CARMB010988), 2 - Hose Fittings for Housing (3/4 PLG), 1 - Male Hose x Male Garden Hose Brass Fitting. Fills pools/spas up to 10,000 gallons.