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FHW testing pressure

Scott M_3
Scott M_3 Member Posts: 32
I have installed some new baseboard with 34 inch copper pipe. Before I connect it to the system I would like to test it using compressed air to find any leaks. What is the best pressure to charge the line at and how long should I leave it charge? Thanks everyone.


  • Al Letellier_9
    Al Letellier_9 Member Posts: 929

    We alway test to 1 1/2 times the operating pressure, or more. Be careful with air and don't trust it totally. Air can and will find a leak and stuff debris or flux into the hole and plug it. Put the water to it and there's a leak. have had it happen before, but generally is a safe way to test. Just don't assume that standing pressure for 20 minutes or so is enough proof. Keep a careful eye as you fill the system.
  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    true story...

    even cold water can be decieving...have had system fine for days then hit the system w/ hot water, bammm...flux disolves away...leak. kpc

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