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I am in the process of getting bids to replace my old (circa 1930's) steam boiler. The system is 1 pipe steam. The wet returns are very long and have slight pitch to them as they travel across the front wall of the basement. As they turn the corner and head towards the boiler, they pitch more steeply and then finally enter the bottom of the boiler. One of the wet returns is positioned about 1' below the other and runs parallel to the other one.
This system is very old so no hartford loop, equalizer or such. System has run fine, no banging, etc.
I have had two different opinions on the existing wet returns.
One contractor wants to repipe the wet returns and bring them down to floor level. He was not happy with the current configuration.
The other contractor said there will be no problem and the location works in our favor.
I re-read a portion of one of Dan's books and this seems to be similar to an example he gave that produced negative results for the installer. With the existing boiler, if you measure up 28" from gauge glass center, those wet returns are indeed wet; 95% of that piping is below that line.
If we go to a shorter boiler, over half of that "wet return" piping will be above the 28" measurement. Will this cause banging upon startup? Am I missing something here? Both contractors are listed on this site, so I'm getting confused and a bit leery. If pictures will help, I can post.
Thanks in advance.