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1/4 copper compression fitting leak #4717275
04/05/18 01:22 PM
04/05/18 01:22 PM
Joined: Oct 2011
Posts: 3,003
Chicago, IL
Brybo86 Offline OP
Brybo86  Offline OP
Joined: Oct 2011
Posts: 3,003
Chicago, IL
Trying to connect plastic tubing to copper for fridge/ice maker
Got this coupling from home depot.
Put the sleeve in the plastic worked fine
But the copper tubing connection the to coupling has a tiny leak.
The coupling came with a ferrule in it, tried that first, tiny leak , 1 drop leaks down pipe per minute.
I cut the old ferrule and pipe off, and added a new ferrule.
Same thing, leaking
Tips,
advice?

Last edited by Brybo86; 04/05/18 01:22 PM.

08 Honda Accord EX-L 2.4L M1 EP 0w20 145k
01 Kymco People 50
95 Lexus LS400 M1 AFE 0w30 193k
95 Yamaha Jog
Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717279
04/05/18 01:29 PM
04/05/18 01:29 PM
Joined: Sep 2015
Posts: 1,634
USA
mk378 Offline
mk378  Offline
Joined: Sep 2015
Posts: 1,634
USA
Push-in fittings are the way to go these days.

With the compression fitting, assemble the ferrule and nut hand tight, then put the tube in-- making sure it goes all the way in-- then tighten the nut.

Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717290
04/05/18 01:42 PM
04/05/18 01:42 PM
Joined: Feb 2010
Posts: 318
Minnesota
bruckus Offline
bruckus  Offline
Joined: Feb 2010
Posts: 318
Minnesota
Like mk378 says, it seems like the Sharkbite fittings or similar are easy and reliable. On the one you have make sure all the surfaces are clean and damage free. Any scratches and such will cause a leak. Sometimes the will self seal after awhile.

Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717292
04/05/18 01:48 PM
04/05/18 01:48 PM
Joined: Jun 2015
Posts: 713
Arizona
Kawiguy454 Offline
Kawiguy454  Offline
Joined: Jun 2015
Posts: 713
Arizona
If the copper tube was clean and not deformed or scratched then you just need to compress it to seal. Dont be afraid to crank down the compression fitting until the edges of the brass ferrule COMPRESS onto the copper pipe and seal. It wont seal over time more so make sure its not leaking before you put it away.

Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717294
04/05/18 01:50 PM
04/05/18 01:50 PM
Joined: Jun 2003
Posts: 33,807
ME
eljefino Offline
eljefino  Offline
Joined: Jun 2003
Posts: 33,807
ME
Polish up the outer surfaces of both copper and plastic with some fine grit sand paper.

Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717349
04/05/18 02:57 PM
04/05/18 02:57 PM
Joined: Jul 2014
Posts: 378
Ceciltucky Maryland
Oldtom Offline
Oldtom  Offline
Joined: Jul 2014
Posts: 378
Ceciltucky Maryland
I have had good luck putting a drop of oil on the threads of brass compression fittings. The oil lets the "sticky" brass threads tighten up better. keep the oil out of the water line proper.

Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717375
04/05/18 03:20 PM
04/05/18 03:20 PM
Joined: Feb 2013
Posts: 3,393
Central Virginia
Silverado12 Online content
Silverado12  Online Content
Joined: Feb 2013
Posts: 3,393
Central Virginia
Lime in the water will seal a small leak by itself. I would bear down on the compression fitting a little tighter.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
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07 Harley Dyna Street Bob 96 c.i. 6 sp.
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Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717398
04/05/18 03:43 PM
04/05/18 03:43 PM
Joined: Oct 2011
Posts: 3,003
Chicago, IL
Brybo86 Offline OP
Brybo86  Offline OP
Joined: Oct 2011
Posts: 3,003
Chicago, IL
They don't make a 1/4 OD push to connect
I used some steel wool on the copper end

I'll just have to get another coupling and try again.


08 Honda Accord EX-L 2.4L M1 EP 0w20 145k
01 Kymco People 50
95 Lexus LS400 M1 AFE 0w30 193k
95 Yamaha Jog
Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717416
04/05/18 04:09 PM
04/05/18 04:09 PM
Joined: Sep 2015
Posts: 1,634
USA
mk378 Offline
mk378  Offline
Joined: Sep 2015
Posts: 1,634
USA

Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717431
04/05/18 04:32 PM
04/05/18 04:32 PM
Joined: Dec 2016
Posts: 7,506
Waco, TX
Linctex Online content
Linctex  Online Content
Joined: Dec 2016
Posts: 7,506
Waco, TX
Permatex liquid teflon thread sealant.

Just smear a very light coat on the "barrel" (none on the threads) - done



"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: 1/4 copper compression fitting leak [Re: Brybo86] #4717578
04/05/18 06:37 PM
04/05/18 06:37 PM
Joined: May 2009
Posts: 5,434
Canada
expat Offline
expat  Offline
Joined: May 2009
Posts: 5,434
Canada
As above, or I have used a wrap of teflon tape.

Re: 1/4 copper compression fitting leak [Re: mk378] #4720340
04/08/18 08:20 AM
04/08/18 08:20 AM
Joined: Oct 2011
Posts: 3,003
Chicago, IL
Brybo86 Offline OP
Brybo86  Offline OP
Joined: Oct 2011
Posts: 3,003
Chicago, IL

Those are 1/4in ID not OD
Came out to 3/8 OD.

I got it all connected with a second new 1/4 OD union coupling


08 Honda Accord EX-L 2.4L M1 EP 0w20 145k
01 Kymco People 50
95 Lexus LS400 M1 AFE 0w30 193k
95 Yamaha Jog
Re: 1/4 copper compression fitting leak [Re: Brybo86] #4720374
04/08/18 09:01 AM
04/08/18 09:01 AM
Joined: Sep 2015
Posts: 1,634
USA
mk378 Offline
mk378  Offline
Joined: Sep 2015
Posts: 1,634
USA
You must have had the wrong part. Lowes and similar stores definitely sell them for 1/4 inch OD (as well as 3/8 and 1/2). Small tubing is trade-sized by OD.

Last edited by mk378; 04/08/18 09:02 AM.
Re: 1/4 copper compression fitting leak [Re: Brybo86] #4720390
04/08/18 09:19 AM
04/08/18 09:19 AM
Joined: Jan 2018
Posts: 266
KS
red7404 Offline
red7404  Offline
Joined: Jan 2018
Posts: 266
KS
for what its worth. i cant stand compression fittings. i like double flare. like on a break line. NEVER had one fail. and plastic is NOT even right for any thing.

Re: 1/4 copper compression fitting leak [Re: Brybo86] #4720688
04/08/18 02:50 PM
04/08/18 02:50 PM
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
BlueOvalFitter Offline
BlueOvalFitter  Offline
Joined: Feb 2003
Posts: 6,003
Cajun Country, La.
You're not supposed to use the brass ferrule on plastic tubing. It cuts into the tubing causing a leak. Use a plastic ferrule. Tighten the **** out of the copper side, with a back up wrench holding the fitting.
35 years experience as a pipe fitter/journeyman plumber/welder/-6 years as an ABC pipe fitter teacher.


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