Originally Posted by jsbeckton
We have a boiler for hot water heat (in addition to our hot water heater) and I wanted to know if isolating the water when we leave every day is ok? (We have some pipes that are suceptile to freezing). I would imagine that the boiler might needed to be topped off every now and again due to minor leakage but is it taking in new water often and would isolating the main line be an issue?
While you are there , turn off you water feed valve for a few days and see if you lose water pressure. If you do then you should get the leaks fixed. If you have leaks and you keep adding new water to the boiler , you crack out your boiler so you would have to replace it. When you add new water and it is heated it drops the lime out of the water and this lime builds up in the bottom of the boiler until the burners are firing against dry cast iron, crack , crack, crack. This is something you should do every year. You should be able to torn off your feed valve and the boiler should not need
water all winter long. But test it every year. If you are using the boiler when making this test for a few days, then you will see the pressure will go up and down depending on the water temp. lows of maybe 10 or 12, hi's of maybe 22to 26. later paul