Water feeder was set for 18lbs EX-30 was set for 18lbs.When boiler cycles it goes to 23lbs but when it shuts down and cools off the press.gage shows zero lbs why is this. So could we have a leak or a bad gauge? If you tap on the gauge does the needle jump up? Is the gauge a combination temp and pressure unit? If so does it show temperature? What temp are you seeing?Īs a retired pipe fitter I installed a Peerless MIH11-05 in Sept.2019. If our starting pressure exceeds 30 psi the TPR valve would dump If your pressure never gets above 23 psi then - when you check the TPR valve you ought to see no spillage there. When the boiler gets hot, up to just under 200F, the relief valve will stay shut. Phil In a typical residential hot water boiler the pressure of the boiler when cold is set to about 12 psi. Water feeder valve was turned off after Initial fill up If you see the COLD pressure fall below the initial pressure then there's most-likely a leak to find and fix. In any event if you turn off water in to a hydronic heating boiler (that's hot water, not steam) you ought not see the boiler system losing water (and pressure). Phil Usually there is a pressure reducer/water feeder that's left with live feed into it, thence feeding into the boiler (manufacturers warn against this common practice). On a hot water boiler how do you test the water pressure from the automatic water feeder If you drain the boiler the water feeder will re-feed up to that setting, read on the boiler gauge (not that those are lab-precise) Thomas When the boiler is cold you will, on a typical residential system see about 12 psi in the boiler. On by (mod) - normal residential hydronic heating boiler pressure level Water pressure falls below a normal level (perhaps 12 psi when the boiler is cold). On these older systems the "automatic water feeder" is often aīell-shaped device which opens and sends makeup water into the heating boiler and its piping whenever the heating system's internal The expansion tank and water feeder valve are separate physical units. The photos show a modern automatic pressure-reducing water feeder valve on a hydronic (hot water) heating boiler - one of the safety controls which we discuss in this article.Ĭontact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution. Hydronic (hot water) Heating Boiler Pressure Reducer / Water Feed Valve FAQs We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. This article series explains hot water boiler (hydronic heat) pressure reducing valves and types of manual and automatic water feeder valves used on hot water heating boilers, including when and how to add makeup water to a boiler. Heating boiler pressure reducing or water feeder valve questions and answers. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.
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