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Pressure vs. Water Test

Brando
Brando Member Posts: 11
in Radiant Heating
Some contractors are ok with a pressure test of the pex tubing, some insist on running water through the loops. What are the pros and cons of this? I would like to run a pressure test because running the water supplies is beyond what I want to do at this point in the project.

As always, your thoughts are appreciated!

Brando

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 26,274
    The problem with an air test is that the pressure will change with the temperature and obscure small leaks, while a water test, while the pressure will also change with temperature, a small leak will be much more obvious.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • hot_rod
    hot_rod Member Posts: 25,517
    air testing is fine, especially if freezing could be possible 

    Be sure you cap off any auto air vents, they do not hold air tests
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
    STEVEusaPA

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