Triple Big Flow Iron/Sulphur with 55W Ultraviolet Light UV Sterilizer Sediment & Carbon Well Water Filter Purifier 12 GPM Whole House System with 1″ Inlet/Outlet Ports with Filters included (1) sediment (1) CTO (1) Iron Cartridge (1) UV 55 W UV Sterilizer / Philips UV bulb Water Flow: 12 GPM LightPower: 55 W Dimension: (inch) 36 inch x 2.5 inch Transformer light indicator will switch off during lamp failure. Check for possible lamp burn or any connection problem In/Out Port size (MNPT): 3/4 inch 2 Pcs 2.5 inch clamp are included to enable you mount the UV on top of your system or on the Wall Casing Material: S.S304S.S Pressure max:125 PSI 110 V transformer included / 110VAC, /60HZ CE Listed Light lifetime: 9000 hours