The Water Heater Overflow Is Stuck

Dangers

The relief valve is a vital part of the water heater when high pressure problems occur. If the overflow system is stuck, water or air cannot escape. If the system overheats or applies too much pressure to the contents of the tank, the tank can crack or explode, damaging surrounding pipes and materials. A couple different problems can lead to a stuck relief valve.

Relief valves are not designed to be used constantly. If a relief valve is used frequently because of inherent overflow problems with your water heater, it will wear out. Eventually, old relief valves may become stuck and fail to operate automatically when needed. If an old valve is broken or stuck shut, you must replace it entirely.

Sometimes, the valve still works mechanically, but is shut due to sediment buildup that it cannot force aside. The sediment may be common dust and contaminants from outside the tank or could be a layer of scale built up from mineral deposits on the inside of the tank. Rust and other corrosion issues could also be responsible for the problem. In this case, you may be able to clean the overflow system in order to fix the problem with the relief valve.

To ensure that your relief valve does not become stuck again, clean it regularly and ensure that it is operating correctly. Examine the system for signs of wear and corrosion that could point to danger signs. Test the relief valve by opening it and allowing it drain slightly. A full check-up every three years can ensure that the valve will work when it is needed.