swcooper
New Member
I have a gas - hot water central heating system, with a regulator from the mains to maintain water level and an expansion tank inline close to the boiler (60k BTU Burnham "Holiday", good few years old). Recently the pressure (there's a gauge on the boiler) has been swinging alot when it is in use - it rises until the red zone on the gauge is reached, and the pressure relief valve kicks in. On the plus side, the relief valve looks beautifully calibrated right at the start of the red part of the gauge (I think it's 30PSI or so, it's also marked in altitude units). But on the downside, there's always a puddle on the floor of the basement when it's cold. This is a new problem this year - any idea what can be causing it? Can't imagine the expansion tank does anything active to go wrong.
Thanks,
Simon
Thanks,
Simon