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sooner302
one pipe steam

I have been told that copper 3" mains fitted between cast is a problem Does anyone know why??? The main is mostly cast80ft. someone-(previous owner) replaced 18 feet of cast 2yrs ago with 3" copper Also-there is approx.6ft of 2"galvinized pipe running vertical from the main down to the return. Both of these pipes are above the water line. What damage is these different metals doing to the rest of the cast,or worse yet,the boiler???

johnjh2o
Re: one pipe steam

The copper will not last as long as black iron in a steam system, but it will have no bad effects on the boiler or existing piping. If it was on a domestic water line then that would be a different story.

John

ZZZ
Re: one pipe steam

Electrolysis, you need dielectric flanges is my guess. With scrap copper bringing $3/lb, it might pay for the change to CI.

johnjh2o
Re: one pipe steam

You do not get electrolysis on heating systems. If that were the case you would need a dielectric at every radiator where the brass valves connect to them.

John

sooner302
Re: one pipe steam

Thanks for the info guys,Since i bought this 4-unit,its been a battle getting this boiler and rad,s straightend out.Ive installed antler systems on the mains,installed dan-foss thermo,s on each rad,pitched all the rads,moved the wall stat to unit 4(coldest unit).By doing so ive managed to lower the heat bill by 350.00 a month.Ive also insulated every inch of piping.Again thanks so much!:)

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