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Boiler pressure test loosing pressure
rickster05
Member Posts: 39
Plumbed yesterday. Filled to 50psi for test. Lost pressure over 6hrs. Soaped all joints, no bubbles-leaks. Tested boiler block prior, held 15 psi indefinitely.
Want to fill it and see, would make the fix more difficult though…
Tarm Solo Plus wood boiler with 600 gal storage tank using repurposed cast iron radiators.
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Comments
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Was there a drastic temperature change, by any chance? What is the relief valve rated for and why is it over 30 psi?0
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Maybe you know this, but ...
Your gauge has two scales. It shows 20 PSI which corresponds to the pressure needed to heat a radiator 50 feet above the boiler. So, at the moment you took the photo, your system had 20 PSI.
Water molecules are larger than air molecules. That's how Goretex works. So your air leak might not leak water. Also, sometimes small leaks plug on their own. This worked better with steel pipe than it does with copper pipe, but sediment and corrosion can plug a small leak at low pressures.
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GroundUp said:Was there a drastic temperature change, by any chance? What is the relief valve rated for and why is it over 30 psi?
Tarm Solo Plus wood boiler with 600 gal storage tank using repurposed cast iron radiators.0 -
WMno57 said:Maybe you know this, but ... Your gauge has two scales. It shows 20 PSI which corresponds to the pressure needed to heat a radiator 50 feet above the boiler. So, at the moment you took the photo, your system had 20 PSI. Water molecules are larger than air molecules. That's how Goretex works. So your air leak might not leak water. Also, sometimes small leaks plug on their own. This worked better with steel pipe than it does with copper pipe, but sediment and corrosion can plug a small leak at low pressures.Tarm Solo Plus wood boiler with 600 gal storage tank using repurposed cast iron radiators.0
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WMno57 said:Suggest you bump the pressure up to 29 PSI and re-do the soap bubble testing.Tarm Solo Plus wood boiler with 600 gal storage tank using repurposed cast iron radiators.0
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WMno57 said:Maybe you know this, but ... Your gauge has two scales. It shows 20 PSI which corresponds to the pressure needed to heat a radiator 50 feet above the boiler. So, at the moment you took the photo, your system had 20 PSI. Water molecules are larger than air molecules. That's how Goretex works. So your air leak might not leak water. Also, sometimes small leaks plug on their own. This worked better with steel pipe than it does with copper pipe, but sediment and corrosion can plug a small leak at low pressures.WMno57 said:Suggest you bump the pressure up to 29 PSI and re-do the soap bubble testing.Tarm Solo Plus wood boiler with 600 gal storage tank using repurposed cast iron radiators.0
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Looking good! Maybe drop it to 20 and let it sit for a day.
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