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-   -   Smoothing the inside of a scratched pipe (http://www.diychatroom.com/f7/smoothing-inside-scratched-pipe-173695/)

jooleyen 03-05-2013 08:52 PM

Smoothing the inside of a scratched pipe
 
Hi, I was having trouble removing a Moen 1222 cartridge in my shower/tub faucet, so I decided to drill the whole unit out with a drill bit. I ended up making some indentations inside the metal pipe that houses the cartridge and now the new cartridge doesn't quite work without leaking.

I figured I'd put some epoxy over the channel/indentations I made to try and smooth the inside of the pipe out.

Does anybody have a better idea?

Thanks!

joecaption 03-05-2013 09:02 PM

Replace the whole unit.

jagans 03-05-2013 09:15 PM

You may be able to clean up the inside with a brake wheel cylinder hone. You can buy one at an auto parts store, and use it on a variable speed drill. Use 3 in 1 oil and kerosene on the hone, and don't go too fast. It may work if the gouges aren't too deep. Clean it out with WD-40 and then wash with water and detergent.

jooleyen 03-05-2013 09:15 PM

Is it as simple as unscrewing the nuts and screwing a new unit in or do I have to tear down a wall?

jooleyen 03-05-2013 09:18 PM

Jagans, I see. Wouldn't that just make the interior of the pipe all too big for the cartridge and then it would leak all over the place even worse?

joecaption 03-05-2013 09:39 PM

Yes that could make the bore to big.
It's removed from the back side of the shower.
And yes the wall would need to be opened up to get at it.

jagans 03-05-2013 09:45 PM

It all depends on how deep the gouges are. Think of the cartridge as a piston in a cylinder, and the O rings as well O rings. The O-rings will make up for a little space as long as the cylinder is smooth inside. They cannot make up for a longitudinal gouge that runs longitudinally the length of the cylinder, because water will run along the gouge. You may very well have to replace the whole unit, as Joe says, but the hone may be worth a try. If the unit was installed correctly, a good plumber can replace it without collateral damage to the wall, but its gonna cost you.

r0ckstarr 03-05-2013 09:52 PM

Not doubting jagans, as the hone was my first thought as well, but is it possible for the cylinder hone to close down far enough to fit inside the pipe? I've ever only honed V8's, and even then, the hone consisted of 3 individual arms with polishing blocks on them.

oh'mike 03-06-2013 05:05 AM

I think you will need to replace that valve-----

jooleyen 03-07-2013 11:58 AM

Well, it seems that I might have to replace the whole valve. BUT... I felt like I was on my way to fixing the problem with some thin carpet tape and epoxy, when the rubber washer thingy on the side of the cartridge bunched up and sprung behind the wall. Now my $40 cartridge is missing one tiny piece and I can't use the thing.

Any ideas for replacing this rubber piece? I can't seem to find it for individual sale, but maybe I could find some stock material and cut it out?

Thanks for your help guys

jagans 03-07-2013 01:12 PM

Rock, Im talking about a brake slave cylinder hone, Not an engine cylinder hone!!! Never seen one? Same principal, but much much smaller. It sounds like the OP is ignoring me anyway, so its a moot point. I guess he thinks epoxy will fix anything. If I was him I would try the hone, or wire wheeling the inside of the cylinder and fill his goofs with molton solder, then re hone. Or I would just replace the valve. I would have been done with this one a long time ago.

r0ckstarr 03-07-2013 01:22 PM

Quote:

Originally Posted by jagans (Post 1131794)
Rock, Im talking about a brake slave cylinder hone, Not an engine cylinder hone!!! Never seen one? Same principal, but much much smaller. It sounds like the OP is ignoring me anyway, so its a moot point. I guess he thinks epoxy will fix anything. If I was him I would try the hone, or wire wheeling the inside of the cylinder and fill his goofs with molton solder, then re hone. Or I would just replace the valve. I would have been done with this one a long time ago.

Whoops! I read the words "piston" and "cylinder", and got sidetracked in my thoughts. I know what you're talking about, just wasn't thinking when I replied. :laughing:

Ghostmaker 03-07-2013 05:43 PM

You just bought yourself a new faucet.


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