Posted: 11/12/2006 7:13:36 PM EDT
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Is there supposed to be a check valve on the piping that feeds a water boiler? Maybe I'm not explaining it right... there is a supply line with a pressure reducing valve that takes cold water and introduces it automatically as needed into the water loop that circulates to the baseboards. That one... does a one-way valve need to be present preventing the water from going backwards into the domestic supply? What about the water line that feeds the indirect hot water tank? check valve or not needed? |
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Yes, there should be a reduced pressure zone backflow preventer with relief tube present on the line that supplies the boiler so that water in the recirculation loop that contains glycol/rust inhibitors etc cannot contaminate drinking water. It is not required on the supply to the "boilermate" or similar if utilized on the system. You should however have a double walled heat excahanger serving the water heating component. Eric Austin Austin Plumbing www.austinplumbinginc.com 315 492 9228 |
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Per state code, which is what were all supposed to be following now, yes an RPZ BFP with relief tube is required. You may want to see if additives were used, they should be. Reason being if your system is run through an area subject to freezing or the system went down for an extended period of time, it wouldnt freeze and split inside finished walls. It REALLY should be done. |