Continuous overflow of water from hot water installation
Exactly where the overflow is released fromThe over temperature safety valve which will release water if the system is over-pressurized or the temperature of the water exceeds 94°C.
Expansion relief valve which will discharge cold water from time to time.
If water drips from the expansion relief, try and determine the volume of water. Water expands when heated and the volume of extended water is directly proportional to the size of the geyser and the thermostat setting. Expansion can vary approximately 10% of the volume of the geyser per day. If the volume expanding exceeds this establish whether the house as balanced pressure.
The term “balanced” refers to Cold Water take off after the pressure reducing valve. In an unbalanced system where common tap mixers or appliances are using hot and cold water simultaneously, cold water may tend to force the hot water back into the line which in turn will over pressurize the electric water heater and cause the expansion relief to flow. The combined expansion relief pressure reducing valve can be serviced with replacement parts in the event of excessive release of water.
The separate expansion pressure reducing systems are not generally serviced with replacement parts. Once again the expansion relief overflow and the safety valve outlet must be piped to the outside by means of metallic pipes, and insulated where freezing can occur.
