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Air Test on Pex

john p_2john p_2 Posts: 315Member
edited October 12 in Gas Heating
Just completed all my near boiler piping to complete my hot water baseboard heating to my finished basement.
Having never used Pex or Manifolds before so I'm not sure if I can air test thru the manifold. And if so, can it be done with the flowmeters & actuators installed?

Comments

  • EzzyTEzzyT Posts: 853Member
    Yes the air test can be done thru the manifold. That’s how we do our testing, just don’t have the actuators installed.
    Creative Solutions Plumbing & Heating LLC
    Lic #12683
    Co-Owners: Fred Drescher, Jr & Eliezer "Ezzy" Travis
    Marketing & Operations: Dawn Drescher
    201.499.0223
    Follow us on Facebook.
    Check us out on Instagram: creative_solutions519
  • john p_2john p_2 Posts: 315Member
    Ok thanks, so just tighten the caps that are located where the actuators will be?
  • EzzyTEzzyT Posts: 853Member
    You can leave them open if you want test all the loops at the same time.
    Creative Solutions Plumbing & Heating LLC
    Lic #12683
    Co-Owners: Fred Drescher, Jr & Eliezer "Ezzy" Travis
    Marketing & Operations: Dawn Drescher
    201.499.0223
    Follow us on Facebook.
    Check us out on Instagram: creative_solutions519
  • HomerJSmithHomerJSmith Posts: 554Member
    edited October 12
    Make sure any air vents are securely closed. That sure is a pertty installation. I'm a hillbilly at heart.

    Pump it up to 30 psi and monitor the gauge for 24 hrs. Know that a change in ambient temperature will raise or lower the gauge reading a few degrees.
  • john p_2john p_2 Posts: 315Member
    Thanks Ezzy
  • EzzyTEzzyT Posts: 853Member
    No problem John and what a beautiful mechanical room you’ve got there.
    Creative Solutions Plumbing & Heating LLC
    Lic #12683
    Co-Owners: Fred Drescher, Jr & Eliezer "Ezzy" Travis
    Marketing & Operations: Dawn Drescher
    201.499.0223
    Follow us on Facebook.
    Check us out on Instagram: creative_solutions519
  • john p_2john p_2 Posts: 315Member
    Thanks, I was laid off when I did it originally. Took me 3 months total but off & on between side jobs.
  • hot_rodhot_rod Posts: 11,773Member
    what pressure rating on the relief?
    I’d stay 5 lbs below that or remove it
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • john p_2john p_2 Posts: 315Member
    Yes, Hot Rod, just want to check and see if there was any missed Pex fittings or unsoldered joints.
  • mattmia2mattmia2 Posts: 121Member
    All the components will have max pressure specs, this will tell you what/how you can test. I like to put a piece of masking tape on the gauge and make a mark where i see the needle and 2 makes on the scale so i can line up the marks on the scale and correct for parallax. mirrored pressure gauges are expensive.
  • Larry WeingartenLarry Weingarten Posts: 1,553Member
    Hi, I sure do like the bend supports and medium sweep 90s! The flow will be sooo happy :p It isn't your question, but one thing that's been discussed here before is a preference for mounting the relief valve upright. Could be a code issue.

    Yours, Larry
  • john p_2john p_2 Posts: 315Member
    Larry...which relief valve?
  • Larry WeingartenLarry Weingarten Posts: 1,553Member
    This one. ;)

  • rick in Alaskarick in Alaska Posts: 877Member
    It is actually written on the tag that says it is supposed to be installed vertically. I am pretty sure it is to keep debris from settling in it, and making it stick.
    Rick
  • john p_2john p_2 Posts: 315Member
    All piping complete, zone control unit installed and all thermostat wires ran to zone control....
  • DZoroDZoro Posts: 796Member
    Nice work, I miss soldering, great job!!!!
    D
  • john p_2john p_2 Posts: 315Member
    So having a hard time holding 60psi ait test...Found small leaks on PEX connections (screw connections) to the manifold. Now I get the supply side to hold 50 psi overnight but the return side goes down to 10 psi overnight.
    I'm confused as the manifold acts like a check valve between the supply & return piping because whenn filling one side it doesn't seem to pass thru causing me to have to test each side separately.
    I cant help but think there is a leak somewhere at the manifold because I walk thru all the rooms where baseboard is installed and hear no leaks....must be minot...any ideas?
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