turnning the water off

Old 12-15-04, 11:06 AM
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turnning the water off

Today I drained my expansion tank and boiler itself. When i got done filling the boiler to about 14psi I turned the thumb screw for the fast fill all the way till it was loose and then turned off the main water supply in. So far I have not had a overpressure problem. Can I leave the main supply off? And how do you know if there isn't enough water in the boiler? Thanks for any kind of help! Jason
Old 12-15-04, 12:02 PM
Join Date: Mar 2000
Location: Lake Murray, SC USA
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Why did you drain the boiler and expansion tank?

Have you been able to bleed all of the radiators, and are they all hot?

You know you have enough water when the boiler pressure is 12-15 psig for a one story home or 15-18 psig for a two story home, pressure measured with the boiler not fired, and no circulator running.

When you bleed the radiators the pressure will drop. You should turn the shutoff valve back on and adjust the auto-fill valve to get to the correct pressure. I think what you are referring to as a fast feed is your auto-fill valve. It should be bell shaped with a stem out of the top. Turn the stem clockwise to increase the pressure.

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