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It is a bypass valve meant to be opened when the other two valves are closed. The horizontal pipe above is connected using two diverter tees: In a one-pipe system, each diverter tee restricts flow to direct a portion of the hot water through the local radiator and then return that flow back to the main line. If the radiator in this room were shut off ...


Maximum temperature of a household steam system is all of 250F, so not even paper will ignite from contact with steam pipes in a house (15PSI) boiler system. High pressure steam is not found in houses (in modern times - early systems were very dangerous) unless they are in major violation of a lot of codes and safety standards that would be of far more ...


In general terms no. The standard steam pipe insulation used today is shaped fiberglass tubes. I would have suggested installing conventional fiberglass pipe insulation on the pipes prior to insulating the walls. I feel that trying to get batt insulation around the pipes could leave voids.


Steam systems are typically black iron pipe. The valves may be brass or iron. The steam systems in my area, northeastern U.S. are at the least 60 years old. Most of the original valves are likely inoperative by now. The systems require little maintenance with the exception of the boiler itself. I was taught the valves should be open or closed, never halfway. ...


I have lived with hot-water heating for 70+ years. I have never seen this valve used. I have been strongly advised to never touch them, since the packing washer will have hardened decades ago, and turning the handle (if possible) could produce a permanent leak out of the system around the stem. All my systems have been one boiler-one circulating pump, ...


Extending the exhausts (to the roof or around the corner) seems the only reasonable solution to me. Check the installer's manual to see if it needs to be in 3" for the new distance length.


Your choice of radiant heat is the best, no matter where you put it, albeit it will not be the most efficient under your floors as a retro fit. The way radiant works is just that, radiant. Extremely different than forced air, where warm air is blowing out of ducts, dramatically changing the humidity. If warm air was blowing under your floor, yes they may ...

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