Compessor fittings

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Peter Balcombe
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Compessor fittings

Post by Peter Balcombe » 09 Aug 2019, 17:56

Whilst adding a water filter to my old Sealey 6L tank compressor, I temporarily undid a 1/4” BSP pipe union at the tank feed to the pressure switch assembly - don’t ask why!
When refitting this union, it didn’t seem to fully tighten, then the pipe came loose in the nut!
The pics below show the two ends now.
The pipe has just a small shoulder at the end instead of an olive, whereas the tank fitting has a domed top.
Has the olive stuck in the tank fitting, or am I just trying to tighten the union up too much?

The 3rd pic shows the pressure switch end of the pipe when disconnected.

Any pointers would be greatly appreciated.
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7FFC82E5-C1F8-4350-BA01-6AA5E910CBEF.jpeg
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Barry_Cole
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Re: Compessor fittings

Post by Barry_Cole » 09 Aug 2019, 19:14

Peter,
Looking at Pics 1 & 2, that looks like a flared fitting that does not have an olive. The end of the pipe is spread in a flaring tool, and that clamps between the inside of the nut, and the end of the fitting. You have probably over tightened it over the years, and deformed the end of the copper pipe. It's difficult to re-form the pipe without the proper tool.

BC

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Peter Balcombe
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Re: Compessor fittings

Post by Peter Balcombe » 09 Aug 2019, 22:40

Thanks Barry, but that sounds a bit of a bummer as it is the first time I have touched that union - although that pipe may be prone to having been knocked due to it being on the side of the tank!!

Is it likely to be possible to reset the pipe shape locally?, else what else I could do to get a good joint as the unit is pretty much useless without it.

geoff_crew
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Re: Compessor fittings

Post by geoff_crew » 09 Aug 2019, 23:26

Peter, Barry's right it does appear to be a flair end (not requiring an olive) but unfortunately from what i can see from the picture the flair is not sufficient enough to retain the nut as IMHO the flair should be much more "trumpet" shaped. If you can remove the pipe and take it to a Garage workshop they might either be able to re-flair it or remake a new end for you. If you're unable to remove the pipe at the other end for some reason, then your only option is to cut the pipe off and get a new one made and solder it back on with a joiner.
Hope this helps.
Geoff
aka Motley

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Peter Balcombe
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Re: Compessor fittings

Post by Peter Balcombe » 10 Aug 2019, 08:33

Many thanks Geoff.
The pipe is totally disconnected (other end has an olive fitting into bottom of pressure switch unit) so can easily take to a garage or somewhere that can reform the end.
I will ask at my local back street garage as the guy there will probably know someone who can, even if he can’t.
Peter

Chris Bowles
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Re: Compessor fittings

Post by Chris Bowles » 10 Aug 2019, 08:39

Peter, another option, is to screw a socket over the thread, then you could fit a compression fitting into the top of the socket, 90deg bend and reconnect the pipe

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Barry_Cole
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Re: Compessor fittings

Post by Barry_Cole » 10 Aug 2019, 08:58

Peter,
I have sent you an e-mail.

BC

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Peter Balcombe
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Re: Compessor fittings

Post by Peter Balcombe » 12 Aug 2019, 11:24

Many thanks all, but pipe end now re-flared using the appropriate tool :)
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Barry_Cole
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Re: Compessor fittings

Post by Barry_Cole » 12 Aug 2019, 11:30

Yes, that looks spot on.

:D :D :D :D

BC

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Peter Balcombe
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Re: Compessor fittings

Post by Peter Balcombe » 12 Aug 2019, 18:56

All back together now & holding tank pressure ok, so union must be ok again :)
Will give it a whirl with my new touch-up gun when the weather calms down a bit.

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