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Measuring makeup water in a hydronic system

In_New_England Member Posts: 130
Now that I've already had a leaking oil tank, time to move on to my next fear: leaks in the hydronic system.

I think the best way to get early warning of the leaks is likely to be measuring makeup water. How would I do this. I have a valve with a water pressure setting that I assume makes up the water, but I don't have a device that will tell me how much.


    JUGHNE Member Posts: 11,058
    You could shut off the fresh water feed valve.

    Note the pressure at that time and monitor if it drops and does not recover.

    It will fluctuate with the firing of the boiler, but if it goes flat then water/air is going somewhere.

    You should have a LWCO if you want to leave the water feed off for any length of time.

    If you want to know how much then you can install a water meter, maybe $100+ for one.
  • hot_rod
    hot_rod Member Posts: 22,105
    I use this type for both troubleshooting and calculating fill volume to add conditioners 

    it catches those very small flows best 
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • mattmia2
    mattmia2 Member Posts: 9,622
    It seems like they charge a lot to install the microswitch on the dial.