3M™ SGP165BN-T ScaleGard™ Pro VIH water softener system. Capacity: 719 gallons at 150 ppm (9 GPG) hardness, Flow rate: 1 GPM, Rating: 1.0 micron, Reduces: hardness, chlorine taste and odor, scale, Application: coffee, espresso, vending, steamer, combi oven and proofer oven. It has a built-in bypass that allows 25% of inlet water to pass through untreated. Valve-in-head design simultaneously shuts off and vents water, allowing for simple and virtually trouble-free cartridge change-outs without the need to shut off the upstream feed water. 3/8" FNPT ports. Replacement cartridge: P165BN part number 5633001.