Jon Hodgkins Posted October 19, 2016 Report Share Posted October 19, 2016 I saw this Williamson oil fired boiler with no readily apparent TPRV. They did not install an extension on the back flow preventer - minor issue, but leaves concern that other parts of installation were performed incorrectly. I reached down to feel if it was maybe built in and concealed by the jacket, but did not feel any other pipes. Is the brass fitting on the top of the black iron pipe an air bleeder valve? Is there any reason why a TPRV would not be required for a boiler. Should I be concerned? Click to Enlarge 38.47 KB Click to Enlarge 33.76 KB Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted October 19, 2016 Report Share Posted October 19, 2016 John, PRVs can be positioned in the piping near the boiler. That said, the air bleeder in the photo is oddly placed and person who misplaced the bleeder may have removed the PRV. There should be a PRV in the system. It is a component that is dangerous to omit. Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted October 19, 2016 Report Share Posted October 19, 2016 The air vent is at the correct tapping. This same tapping can be used for the water fill and pipe to non-diaphragm type expansion tank. The PRV tapping is at the rear of the boiler (the side facing the drywall) near the top. There should be a hole in the jacket at that location. When I get home, I'll look for the diagram of the near boiler piping for this boiler. Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted October 19, 2016 Report Share Posted October 19, 2016 ... built in air scoop. Kibbel, as usual, is correct. Click to Enlarge 176.29 KB Quote Link to comment Share on other sites More sharing options...
Jon Hodgkins Posted October 20, 2016 Author Report Share Posted October 20, 2016 Thanks everyone for the replies. A 3 million dollar house without a PRV for the boiler. Quote Link to comment Share on other sites More sharing options...
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