Water hardness is the measure of dissolved calcium, magnesium, and other minerals in your drinking water. It is typically measured in grains of hardness which equates to 17.1 mg/L of dissolved calcium carbonate. If not treated hard water can cause mineral build-up in your heater. Mineral build-up reduces flow and produces flakes at your fixtures.
Hard water and scale build up is one of most common reasons for a heat exchanger failure. It is also one of the easiest to prevent by using a water softener, a Noritz Scale Shield or flushing the unit yearly.
Water Hardness
describes the amount of free calcium and magnesium in the water supply. These minerals can create lime scale. Often expressed as grains per gallon (GPG), parts per million (ppm), or mg/L
Fixtures
A device that receives water from the water supply piping
Hardness
describes the amount of free calcium and magnesium in the water supply. These minerals can create lime scale. Often expressed as grains per gallon (GPG), parts per million (ppm), or mg/L