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Leak in system?

maas
maas Member Posts: 2
in THE MAIN WALL
In a 2500sq. ft house I have radiant in floor down stairs and in the ceiling upstairs. It all pressure tested okay before and after covering but I've been losing about 5 psi over a period of about six months. The system is closed and pressure starts at 17 psi. I don't mind turning on the make up water valve every few months if need be.
Anyway my question is: Is it normal to loose some pressure over time? Say through the Spirovent? Or do I have a leak?
Thanks for the help!

Comments

  • Timco
    Timco Member Posts: 3,040


    If the make-up water is off, then it could just be the air being removed from the water.(Spirovent) If you have a back flow preventer, you can just leave the make-up water on.

    Tim
    Just a guy running some pipes.
  • maas
    maas Member Posts: 2


    Thanks Tim.
    I was concerned that by leaving the make up water on all the time and had a failure in the system I could end up with a heck of a mess before I knew I had a problem. Is it common practice to just leave the make up water on?
  • Ragu_5
    Ragu_5 Member Posts: 315
    Maas...

    My father in law has a system that holds 80 gallons of fluid: 50% glycol, so we kept it as a closed system. He monitored his pressures all the time, and he added 5 gallons of 50/50 mix over the course of the first year. This was after MASSIVE initial purging. He also has a huge B&G EAS air separator in the system.

    Entrained air can get you, every time. It takes a LONG time to get the last of the air out of the system. Please read Dan's stuff about adding make up water, as every time you add fresh water you add oxygen to the system. Corrosion of ferrous components and lime build up can result. Closed systems, devoid of air, should NOT need make up water. Do you have a Low Water Cut Off (also as per Dan) in the system? Good luck.


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