Boiler Leak E17

1. If its leaking from the temperature and pressure relief valve its either because the boiler has too much water pressure in it or the boiler is heating the water too much. Check the temperature and pressure gauge on the boiler. The pressure should be around 18-21 psi and the temperature should be anywhere from 180-240 degrees. If the pressure in the boiler is up near 28-30 psi the relief valve is designed to discharge the water in the boiler as a safety measure. If the pressure is too high in the boiler the cause is the water feed regulator. Its a small brass device on the water line that supplies fresh water to the boiler. If the boiler is discharging from the relief valve do to high temperature, try turning the temperature dial on the boiler itself (not your thermostat) down, if that doesn’t resolve it then the temperature probe that goes into the boiler is bad.

2. Another cause of a leak could be a crack in one of the boiler’s cast iron (or aluminium) sections. This is a major (and expensive fix) where sometimes the better alternative is to replace the boiler depending on how old it is.

3. It could be your boiler pump leaking from the seals, if this is the case you may need to replace the pump