Comments: 4

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DAN Y:

The water pressure on the gauge should be @ 12-15 psi.

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kerry k:

Look at the identification tag that should be on the boiler. Get the name of the company, where they are located and the model number of the boiler. Call them, or see if they are on line, and get the information from them. The gas company should know as well, and can provide the information as well, or tell you where to get it. They shouldn't need to

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gizmoe:

Dany Y is right on the pressure.
Most systems are set up with an automatic filling devive that reduces your water line pressure to 12 LBS.
You may have a manual valve in place but be careful not to overfill.
Hot water boilers have a relief valve that pops off at 30 LBS.

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uncledjm14:

Yup, assuming that the boiler is in the basement, 12-15 is good. If you have a two story home, you may want to boost it to 15-18.

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scott_kel:

Several people have answered 12-15 psi. this is partly correct but there is a thing called expansion that takes place when water is heated.So 12-15 psi is correct when the boiler is cold but as it heats that pressure is going to go up.There is an expansion tank to absorb this expanding water but the pressure will still rise some.Someone else stated


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