When hot water is drawn from the hot tap it appears to be milky. After a few minutes it clears. What causes this?

All Water supplies contain varying amounts of dissolved air. The air dissolves in the water when it is stored in open dams and reservoirs. Air is more soluble in cold water than it is in hot water. Ordinary tap water contains more dissolved air when cold than it can contain when hot. You may have…

The valve on the side of the water heater (temperature and pressure relief valve) is dripping water. Is the valve damaged or is there another problem?

A Temperature and Pressure Relief Valve is supplied with all water heaters. Its function is to provide both thermal and pressure relief when required. This will be in the form of discharging water from the valve. There are four types of flow which could be observed from the T&PR Valve. Normal OperationWhen water is heated…

I have noticed a puddle of water around the water heater soon after the heater comes on. Is the water heater leaking?

When gas burns in air, as well as producing heat, there is a chemical reaction producing carbon dioxide, water vapour and nitrogen. A gas water heater burning 30MJ/h will produce more than one litre of water, if the water vapour is allowed to condensate. Condensate is the result of air borne water vapour being chilled…