Can be used in conjunction with one of the NP Cartridges to treat ice machines, coffee urns and other beverage equipment. The NP24DD and NP48DD Housings can be charged with specific NP24 or NP48 cartridges for controlling scale, sediment or objectionable tastes and odors. The NP24DD is equipped with 3/8" FPT connections and handles up to 100 gallons of water (800-900 lbs. of ice per day) when preventing scale and up to 200 gallons of water per day when filtering for sediment or removing taste and odor. It will handle flow rates up to 4.0 gpm. The NP48DD can handle twice the capacities of the NP24DD housing and flow rates up to 5.0 gpm.