Replacing part of a radiator return advice

[Bbillcee]

hi guys

So I am preparing to get a mud job for a tile floor and decided I should open a cement patch that was covering a radiator return pipe...good thing I did!!!! t\This thing is heavy rotted ...prolly leaking already ...so I'm gonna either have the section replaced from the union to where it connects to the other return or do it myself....I think I can handle it no problem....I'm thinking to use copper as I have two lengths here that have been in the garage for a bunch of years...they are type "L" . would it be ok to use this? I can also use black steel as I have threader and stuff but I have seen copper used before and I think it would be easier. My other question is where it goes under the door...should I just continue it straight and cement it in there? I think that was a bad job using those elbows....

 

[John Gayewski]

Any type of metal you embed in concrete will rot. Copper would be better than black.

Whatever size pipe that is, use one size larger hepex. You could also find some kind of wrap if you insist on going back with metal.

 

[Sponsor]

 

[Tuttles Revenge]

Why not go over the top of the door with it? Seems it goes up at the other end of the run.

 

[Bbillcee]

Why not go over the top of the door with it? Seems it goes up at the other end of the run.

its comes down from an elevated radiator!

 

[Fitter30]

How old is that pipe 30 years? Replace with schedule 80 pipe 1k fittings or stainless tubing and hydraulic compression fittings(many brands a double compression fitting). Stainless pipe needs special dies to thread.
plumbing supply houses probably won't have the pipe and fitting but a supply house for mechanical contractors will.