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I know some of us think we see it all well and now for something completely different . I always try to be diligent in looking at 2 pipe issues and well I figured I caught it all but as a refresher and in case you forget this rule here’s the reminder look look and look some more and always throw the disclaimer in there over and over . Well after fixing what was surely the main issue no traps on recessed radiator which where pressurizing the dry returns and updating the dry return and end of the mains which made huge differences being they where never updated from the coal days .one radiator which had no trap and was blasting heat now gave nothing I realized there some a miss ,there where some old water seal traps and a mis mosh of all types of radiator traps marsh ,Hoffmann and sarco and that there’s gonna be bad ones and of course the mis mosh of replacement radiators and most all missing the original orifice supply valves .As I looked at the rad which was blazing and now ice I started to look again at the riser which serves another radiator . I figures as badly as a lot of piping was that it did work at one time . We finished up order some more traps and informed the Ho we would return to finish . As I drove home and hours later it can to me who ever installed the recessed 2 Nd floor radiator had reverse the supply and return w a hand valve on the return and Richardson water seal trap on the supply .so yet another de knuckling project removing and reversing the piping on the recessed rad in a beautifully super bath . So for all you 2 pipe fixers never under estimate how stupid some trades men can be ,the original plumber who was working on the system for years finally admitted he was licked all over and was done only after about 10 years of dicking around and replacing all sorts of stuff ,traps .radiator supply valve but never updated the dry return venting or main venting ,aside from the traps and bad piping the boiler near boiler piping is garbage using a single tapping and a 2 1/2 header for a 300 btu boiler . I m hoping to repipe this rad and replace a few more traps and hope no other major issues are still hiding . So when out there looking at 2 pipe issues remember that If there s newer radiators and there’s recessed or free standing to really double down on following everything out and to never rule out the stupidity of those who can before you . Last note is if they won’t let you crank the t stat up to find the issues that usually appear after a 15 to 20 minute cycle on 2 pipe system you should just leave them to the rubes and there form misery a 2 pipe system w issues . In closing just when u thought you seen it all someone will amazing you w some thing even stupider then you could have dreamed or done wrong yourself as a youngster ,just can’t make it up and former vapor vacuum systems do not work well w recessed radiator without traps or orificed supply valves and even w they perform like garbage .leave them free standing radiator feeding at the top ,If you don’t want issues . On a side note those who complain about there 2 pipe issues usually except the miracle network to appear and it all to be fixed in a Minute they really are clueless and it’s even sadder that total clueless parade and offer repairs can’t make it up . Now back to work u all
Peace and good luck clammy
Peace and good luck clammy