Fill valve on my heating boiler failed and my pressure relief valve opened at about 31 psi. Guy replaced fill valve, and pressure relief valve. Then "reset" pressure to what appears to be about 14 or 15 psi. My pressure stays at this level no matter if water temp is cold or peak hot (as everyone knows to read the tiny gauges on the boiler is difficult to get exact readings. The gauge starts at 0, then has 2 additional lines, then reads 20. The "arrow is on the 2nd line before the 20 line. So 0, then line, then line, then 20.) My 2 story contemporary has 8 ft ceilings in basement then another foot of floor joist space, 8ft ceiling on first floor then another foot of floor joist space, to bottom of 2nd floor baseboard. So if I calculate correctly I have 8ft plus 1(basement) , another 8ft plus 1(1st floor), then 1ft to top of 2nd floor baseboard. Total 19 feet. I understand to calculate needed pressure you take total feet and divide it by 2.31. But 19 divided by 2.31 is only 8.22psi at cold temp. My boiler pressure stays basically constant no matter if hot or cold at about 14 or 15 psi, is this too low, too high?
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