What kind of pipe is this?

jerryb46

that pipe you are talking about might be what was used in NY city and areas around as T+P pipe,it is a copper alloy and fittings are a brass alloy that was brazed together.Fittings and pipe are no longer made or stocked.repairs can be done by swedgeing copper to meet the size and silvering soldering togeather,GOOD LUCK

George J.

I am doing some work on a heating system and the existing supplies and returns are some kind of pipe that I have only seen once before, and that was in my own house, and it all came out anyway. It is a series loop with baseboard. The pipe is the same OD as 3/4" copper and it has copper fittings soldered to it. It looks like electrical pipe and the inside of it is slightly rusted. I had to connect to it in two spots and I was able to solder a 3/4" copper fitting to it. I thought it was copper with some kind of coating on it but it's not because when I sand it there is no copper under it. Does anybody know what kind of pipe it is? I will take a picture tommorow.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

Glen Aspen_2

hydronic steel tubing

Made to the same dimensions as copper. I have not seen or used in many years - and rather than standard flux we used #5 liquid for fluxing. We used it because of the steep price point advantage over copper.

Alan(OnVacationInOregon)Forbes

BundyWeld

It could be BundyWeld; made in the war years when metal, especially copper was hard to get. It's a thin-walled steel tubing with a copper coating to allow for soft soldering.

I've seen it on a few jobs in my area.

Here is more information:

http://www.fundinguniverse.com/company-histories/Bundy-Corporation-Company-History.html

World Plumber

Pipe- EMT conduit

I've run into that before. In the 70's when the price of copper was up some guys were using EMT conduit to cut the cost. You have to put a lot of heat to the conduit to solder it, it sinks the heat away from the joint not like copper to solder but it can be done.

George J.

It does look exactly like a piece of EMT

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"

George J.

It is definitly not brazed. I had to unsweat a few joints. it's definitly soft soldered with 50/50. I think it might be emt. I didn't know you could solder steel.

To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"