Re: replacing cast iron steam pipe with copper tubing
Posted by Pipewerks on February 28, 19101 at 21:24:26:
In response to Re: replacing cast iron steam pipe with copper tubing
: My wife and I have bought an old house. It has a gas fed steam boiler and cast iron feed and return pipes, and cast iron radiators. The system needs a good cleaning--some radiators don't get hot, those that do really do though. The hot and cold water lines in the house are an array of every metal known to man. Also, the floors are not worth keeping so they will be coming up. With all of this one-time, easy access, I will be repalcing all the hot/cold lines, and wonder if now is the time to replace the cast iron steam lines with copper. What I would hope to gain is a system that is care-free for many years, and one that is laid out better, namely conceling pipes in walls, which is currently not the case.

: I am curious what the above plan will sound like to the board, but the BIG QUESTION is is mixing copper with cast iron radiators and boiler a problem in the 'mixing metals' category?

: Thank you for your thoughts,
: Paul

Dear Paul, I admire your ambition to replace all the pipes while the floors are up...sounds like something I would do. However....there are demons lurking in the darkness! specifically..if you have to ask about copper in your system it means you don't understand the basic design of your steam system. That means if you reinstall the piping according to common sense you may make your system into a huge mess. This type of work is best left to an old steam man! Identifying the type system and how it should be piped is all important. The bad part of this is you won't know till the floors are reinstalled and next heating season comes around. If you really want to tackle this though,..have a read through Dan Holohan's book "The lost art of steam heating" at

Replies to this post
There are none.