Your hot water cylinder has a safety valve to vent excess pressure, to avoid the cylinder overheating and exploding like a bomb. It’s a good safety system but sometimes the valve can fail and let too much water out. When that happens it’s like leaving a hot tap running continuously, with money pouring down the drain. Often the first indication of a problem is a hot water bill that is much higher than normal.
A regular check on the overflow pipe can prevent an unpleasant surprise on your next power bill. The overflow pipe runs from the cylinder to outside, usually over a drain. It’s normal for some water to drip from the overflow pipe, probably a cup or two per day at the most. If you notice more water than this, or the overflow pipe running continuously you may have a problem with the valve.
The other problem that can cause your hot water to run out the overflow from the pressure relief valve is a thermostat that sticks on and heats the water continuously instead of cycling on and off . You will notice the water getting extremely hot if this happens.
So, if there is too much water running out the overflow and it’s normal hot water temperature, or cooler, you need a plumber to replace your pressure relief valve. If the overflow water is running continuously and boiling, steaming hot you need an electrician to replace the thermostat.
An occasional glance at the overflow pipe can save you from pouring money down the drain.
For advice on hot water problems in Launceston and surrounding areas, phone Mance Electrical on 6331 4711.
