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Timbear

11:00AM | 01/05/05
Member Since: 11/07/04
83 lifetime posts
Bvplumbing
What is meant by deburring new copper pipe? Does that mean the inside of the pipe has to perfectly smooth? Or is using a wire brush there to remove loose stuff adequate. Thanks!

LonnythePlumber

11:24AM | 01/05/05
When we cut piping with a tubing cutter it leaves a ridge inside the pipe at the cut edge. This causes turbulence which restricts water flow and can lead to pin-holes in the piping. Deburring is a code requirement.

Usually on tubing cutters there is a knife edge to do this or you can buy a separate tool. A box knife will kind of work as will a round file. If you cut with a hacksaw you do not get this edge.

Timbear

01:12PM | 01/05/05
Member Since: 11/07/04
83 lifetime posts
I see. Does a wire brush used inside the pipe accomplish the same thing? How does that cause pinhole leaks?

LonnythePlumber

01:29PM | 01/05/05
The ridge is too hard for a wire brush to knock it off. The ridge causes turbulence by directing the water inward/upward against the inside of the pipe. The pin holes show up in the first few inches from a fitting. The copper institute has some pictures showing water movement in a pipe.

Timbear

03:13PM | 01/05/05
Member Since: 11/07/04
83 lifetime posts
Thanks a lot Lonny, that is very instructive!

carl21l

05:44PM | 01/05/05
Member Since: 03/21/04
173 lifetime posts
I have found that a pocket knife with a small blade is very good for de-burring the copper pipe and I prefer it to the blade on the cutter. An yes, you do need to sharpen the blade more often when cutting the copper.

:o)

JMHO

Carl

Timbear

06:03PM | 01/06/05
Member Since: 11/07/04
83 lifetime posts
Thanks for the replies. One other question, does it help or hurt to use a wire brush on the inside of the pipe after deburring?

LonnythePlumber

05:28AM | 01/07/05
There is no impact on cleaning the inside of the pipe. Do it if you feel it contributes to your work.

Timbear

08:52AM | 01/07/05
Member Since: 11/07/04
83 lifetime posts
Thanks Lenny! It just seems to help my untrained eyes so I can be certain I have gotten the burr smoothed out. You are a great help, I can see I would have been in serious trouble if I had not gotten this issue clarified.

Timbear

03:02PM | 01/08/05
Member Since: 11/07/04
83 lifetime posts
I found a great deburring tool made by Brasscraft, it's very handy and comes with an extra blade.
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