Low pH or acidic water can cause corrosion of copper pipe fittings. In extreme cases the copper dissolves from pipework and can react with soaps causing water to turn blue / green and with hair dyes giving unpredictable results, e.g. blondes go green.
High pH causes scaling in your pipework and can cause unnecessary issues with your boiler and outlets.
The CleanStream® pH filter uses a media which corrects the alkalinity / acidic nature of water without the need for mixing or dosing of chemicals. The media slowly reacts with water and the filter generally only requires topping up once a year.
Current DWI guidelines have water pH between 6.5 and 9.5.