Aqua UV 25 Watt 3/4 inch W/ Wiper UV Sterilizer Fresh Water Sterilizer: 500-1,200 gallons; Flowrate - 1,200 gph for 30,000 w/cm2SUP&gt; Fresh Water Clarifier: up to 4,000 gallons; ideal for water gardens Salt Water Sterilizer: up to 150 gallons; Flowrate - 400gph for 90,000 w/cm2SUP&gt; Dimensions: 26.25" X 4" X 2.5" Inlet: 3/4" barb or FPT, Outlet: 3/4" barb or FPT