What is pH?
pH means potential hydrogen and tells you if your water is neutral, acidic or alkaline.
The scale is logarithmic, so pH 7 is neutral, pH 6.0 is 10x more acidic than neutral, pH 5 is 100x more acidic the neutral, pH 4 is 1000x more acidic than neutral and so on.
Have a look at your some common products at different pH levels
pH levels of below 7.0 is acidic and can cause corrosion problems.
pH levels of above 7.0 are alkaline. Levels above 9.0 can affect taste and make water feel slippery.
The NZ drinking water standards give guideline value of 7.0-8.5 to prevent corrosion and taste problems.