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water feed valve

If the job can afford it, an Axiom feeder is a good compromise between an ongoing, undetected leak and a Biblical flood. If there is a leak, even a small one, the reservoir level will go down and can be noted. There is also an alarm accessory.

If you have a Glycol system, all the better to use Axiom as the fill fluid can match that used in the system. A slow leak is even worse with glycol systems because of undetected dilution, robbing you of the protection you rely upon.

Otherwise I agree that having no hard connection is better in the long run, assuming that LWCO's are used amongst other safeties of course and that the AHJ is OK with that.

In our office, on commercial and institutional systems, we specify a flow switch at the fill connection to alarm 30 seconds of undetected flow. Some AHJ's want to maintain that hard connection despite other precautions.

(P.S.): <i>"I don't know if one of you <b>gay's</b> remember this or if is a fruit of my imagination on my deep sleep nights. Thank you." </i> Not to quibble, but we straight guys have OK opinions too!


  • C.M.
    C.M. Member Posts: 4
    water feed valve

    I think it was Dan that put out this information thrue one of is magazines that he rights, about is best to keep the water feed valve closed to hydronic boiler systems for safety reasons.I don't know if one of you gay's remember this or if is a fruit of my imagination on my deep sleep nights.Thank you.
  • I believe,,,

    the thought is if you leave the valve open it will replenish the system if there is a leak. If the leak remains undiscovered this will cause continous introduction of oxygen rich water into the system thereby causing continuing corrosion and eventual premature failure of the iron parts in the system, especially the cast iron heat exchanger in the boiler. If you close the valve and the system leaks it will soon be discovered by the loss of pressure. A hydronic system is a sealed system and therefore should not be leaking which makes closing the valve the more correct way of doing things. If you close the valve and you lose system pressure you should be finding and repairing the leak(s).
  • Big Ed_4
    Big Ed_4 Member Posts: 2,690

    Yes. It makes safe sence. Just incase a pipe or what ever bursts.Also protects the system of corrosion with a undetected leak You must also explain to the home owner to check and adjust the system pressure.

    I know...... But it covers your butt
    I have enough experience to know , that I dont know it all
This discussion has been closed.