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PostPosted: Sun Sep 17, 2017 8:13 pm 
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If I undo a compression fitting then remove the olive and nut from 15ml copper pipe, can I then fit a new compression fitting onto the pipe, in the same spot? Just to clarify, would the area of pipe be sufficiently distorted to leak or would it seal ok when a new compression fitting was used? regards kevin


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PostPosted: Sun Sep 17, 2017 8:25 pm 
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Should be ok, I have done it several times no problem.
To get the olive off i "hit" the nut several times with a pair of grips / spanner.


When I say hit, its more a case of slide the grips up the pipe fast so it hits the nut and moves the olive, I don't tickle it, but I don't belt it either. usually 2 or 3 goes before it comes off.

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PostPosted: Sun Sep 17, 2017 10:09 pm 
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I've normally found the olive has warped the pipe enough that it can't be removed.


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PostPosted: Sun Sep 17, 2017 10:20 pm 
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Why do you need to remove the nut & olive to attach a new fitting? Very often the existing nut (olive) will fit the replacement fitting, disposing of its nut & new olive as not required. One exception can be if the old fitting had the olive squeezed on to it too far up, and in that case you can file off the end of the pipe.



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PostPosted: Sun Sep 17, 2017 11:13 pm 
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Add a few wraps of ptfe tape around the olive before adding the new fitting to prevent any leaks, round the olive not the thread!



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PostPosted: Mon Sep 18, 2017 5:42 am 
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Exactly you shouldn't need to remove olive or but there is olive puller tool for removing tight olives, I prefer pointing compound and have never had to use ptfe around olives unless pipe is deformed in which case I suggest to replace faulty piece.

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PostPosted: Mon Sep 18, 2017 7:53 am 
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I use a junior hacksaw to carefully cut the old olive off.

Run your finger over the pipe where the old olive was and you will easily feel if the pipe has been crushed.

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PostPosted: Mon Sep 18, 2017 9:04 am 
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I had to use an old olive on a repair and it was leaking a bit past the PTFE when I had finished. Razor on here recommended I use Gas PTFE tape (a bit thicker) and this worked a treat. I think you have to make a decision on whether you have enough pipe to play with. :thumbright:

If you have the access to saw through the olive accurately (as Dave suggested) I would cut about half way through the olive and use the nut to drift it off. The cut will reduce the tension in the olive and there is less risk of scoring the pipe which will lead to leak past.

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PostPosted: Mon Sep 18, 2017 12:49 pm 
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If the pipe is damaged and the compression fitting won't fit use one of these, its a
Compression Repair Coupler, you can get them in Toolstation and Screwfix.

Image

Assuming it is a straight compression fitting of course.



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PostPosted: Mon Sep 18, 2017 1:58 pm 
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adonis wrote:
If the pipe is damaged and the compression fitting won't fit use one of these, its a
Compression Repair Coupler, you can get them in Toolstation and Screwfix.

Image

Assuming it is a straight compression fitting of course.


Is that just an extra long compression fitting?



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PostPosted: Mon Sep 18, 2017 2:19 pm 
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Basically yes, but without stops so you can slide it up one pipe without needing to flex it too much and back down the other pipe.

A type of slip coupling I believe.


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PostPosted: Mon Sep 18, 2017 3:54 pm 
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I think all has been covered here

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PostPosted: Mon Sep 18, 2017 4:03 pm 
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Thanks Adonis, I was not aware of that fitting. That information may be of use in the future. Cheers.

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PostPosted: Mon Sep 18, 2017 4:05 pm 
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adonis wrote:
Basically yes, but without stops so you can slide it up one pipe without needing to flex it too much and back down the other pipe.

A type of slip coupling I believe.


Cool, I never knew that existed! One to remember for certain! THank you :)


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PostPosted: Tue Sep 19, 2017 7:28 pm 
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I doesn't appear the OP is too interested, but hey for anyone reading this; don't bother buying faffy Olive Pullers(you can buy my wife if you like!!).
Use your Water Pump Pliers, un-crimp the old Olive & you'll easily remove it. Unless the tube is very distorted by the old Olive, just slip on a new olive, smear of Boss White & tighten it up again....job done!!

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