Specialized tank with same results as a standard 120 gallon retention tanks but weighs much less at only 30 lbs. and takes up much less floor space...only 12" x 12" area. 1-inch opening allows for easy connection to standard pipe sizes The tank is constructed of all polyglass, noryl, and PVC materials for a durable, long-lasting tank The tank has a 3/4" blowdown drain for getting rid of sediment that may collect on the botton of the tank The system will treat up to 24 GPM with only a 2 psi pressure drop at 60 psi