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Specifications: Inlet : 1"/ 25mm Female Outlet: 1"/ 25mm Female Brine Pipe Fitting: 3/8" Drain Pipe: Power: 12v DC includes transformer for 220v The Automatic Valve Head is designed to be used with water softener systems, for removing hardness (lime/calcium/magnesium/kalk) from water. The Valve head uses a digital control and timer to automatically go through the various stages of a water softener's regeneration cycle. The F63B1 Valve head is very easy to program and operate. TheValve Head allows you to set the renegeration cycle to take place after a set number of days, and at a particular time of day. The Valve head comes with a built in capacitor, which helps to save the valve head's settings for around 3 days if the power should fail. If there is no power for longer than this, then the valve head will revert to the factory settings.