gas boiler 3 floor zone

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I have a question i m trying to get heat on the 3th floor and i cant now when i try to purge the water on the 3th floor barely no water comes out with the lower boiler vale close. when its open water comes out with ease. so i change the air vale on the line thinking maybe the line has air and it still the same. the psi is 8 to 10 pounds so could it be the pressure or do i need to change the circulator pump. the pump about 8 or more years old. the 1st and 2nd floor is older but still working and i am getting heat on the 1st and 2nd floor not the 3th.

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nestor 2015-11-19T02:42:00-05:00 3 Answers 767 views
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  1. Dominick Amorosso
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    2025-01-01T19:54:53-05:00
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    The pressure is a bit low. 15-19 psi is what you’re looking for. Makes sure the fresh water supply is open and stays open for one. Check that and let me know.

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    2024-11-24T22:53:15-05:00
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    thanks for your help you was right I learn how to bring up the psi in my boiler to 19 and I am getting heat now on all floors. I wasn’t sure if it was a psi issue and how to bring it up I did some research and figure it out. I also think the automatic fill valve is bad so I will be changing that soon. thanks again.

  3. Dominick Amorosso
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    2024-11-11T14:27:21-05:00
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    Awesome glad to hear it.