Buried shower arm doesn't line up when tight

[KevinRussell]

I had to remove a shower arm as there is a leak behind the tile (result of adding a presurised cyclinder) and when I put it back the arm doesn't line up when tight.

The plumber had wacked loads of PTFE on it and I think now that we have had a Pressurised Cyclinder fitted the lack of fit has become a problem.

I am using Plumbers Mait - can I pack it and unscrew the arm until it is in the correct place?

Any advice?

 

[Lower]

No, you need a shedload of ptfe tape wrapped around the threads that will seal and allow you to leave the shower arm in the right orientation. Plumbers mate won't do it.

 

[foxhole]

Looks like a hex internal on thread section , does that unscrew from shower arm?

 

[KevinRussell]

The Thread doesn't seem to detach.

 

[foxhole]

You could add a washer internally to see if that stops at correct angle, or thread often has two start points , so unscrew slowly and then back slow counter clockwise 1/3 of a turn and re screw.Failing that lots of tape, gas tape is thicker so requires less.

 

[KevinRussell]

What size washer do you think. How would I measure

 

[foxhole]

Flex Tap Connector Washer

www.toolstation.com

 

[Wayners]

Is that a rubber washer inside?
Could add another to pack.

I Would use PTFE otherwise

 

[oldbuffer]

1. Plumber's Mait is not the right sealant for what you are trying to do.
2. Personally, I'd use Loctite 55. Screw it up tight, then you can back it off up to 1/3 turn and it should still seal. Read and follow the instructions on the packaging. In particular, you are advised to roughen up the male threads lightly with a fil, and wind the Loctite 55 on around and across the threads.
3. Another alternative is liquid PTFE. I've used the "Flomasta" (Screwfix) one with success in awkward places. However, both male and female threads must be scrupulously clean and absolutely free of oil or grease. Run a bead over the second, third and fourth male threads, screw in fully until you reach the correct orientation, then leave for 20 minutes or so. Not terribly easy to get out at a later date!

 

[dilalio]

LOCTITE 55 PIPE SEAL CORD 50M 50 METER - Fasteners Fixings and Tools

<p> <a title="Click here for Safety Data Sheet" class="primary" href="../assets/file/pdf/Loctite%20MSDS/0006.2056938.EN..GB%20loctite%2055.pdf" target="_blank">Safety Data Sheet</a></p><p> <a title="Click here for Technical Data" class="primary"...

www.fastenersfixingsandtools.co.uk

 

[yorksbuilder]

Perfect use case for loctite 55