Loctite 55

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cr0ft

cr0ft

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Is this stuff rubbish or am I just unlucky? Applied it to a 2" BSP joint as per the instructions. Each time it kept pulling out or jamming up the thread.

Tired 4 times in total before opting for PTFE instead. Job done..
 
Did you do it the right way / overlap the last strand

I would say unlucky

 
I use it on everything and its great gear, however I have never used it on anything as big as 2”
 
I think I might have been a doughnut and roughed up the grooves of the thread. I get the impression you're supposed to run the saw across the threads rather than along the grooves??

Anything better than a saw blade to rough them up? That will take forever on a 2" thread!
 
55 is good if it's a slack thread. For everything else I use 577 LOCTITE 577 Pipe Sealant - Loctite
In two years, ive had one 1" threaded fitting drip.

Every single threaded joint on this job, was done with 577 . Including the 2"

IMG_1141.JPG


IMG_1143.JPG
 
Ha, yes roughen the threads so the cord doesnt slip off.
2x hacksaw blades with a gaffa tape handle and scrape as your turn the pipe/fitting. 30 seconds job done
 
Don't use too much 55. It's tougher than ptfe and will just end up out of the joint. I split a 1/2" backplate elbow tightening a cranked bar shower fitting !
 
Will try that tomorrow scott_d. Just seems like there's no room in the thread for the sealant though. Had 4 turns going in, packet says 15 needed. Couldn't tighten it with 2x 2' stilsons!

Which merchants stock loctite 577 chalked please? With a 3 hour cure time I'd like to try it tomorrow for attempt 2!
 
cr0ft said:
Will try that tomorrow scott_d. Just seems like there's no room in the thread for the sealant though. Had 4 turns going in, packet says 15 needed. Couldn't tighten it with 2x 2' stilsons!

Which merchants stock loctite 577 chalked please? With a 3 hour cure time I'd like to try it tomorrow for attempt 2!
Click to expand...

What's it for ?
 
2" softened water feed to some massive loft tanks.
 
Is the fitting a tight fit with nothing on?
4 turns per thread or over the entire fitting?
 
I get the large toothpaste sized tubes from a merchant in leeds £42. Seems a lot, but that whole job used 1/4 of it.

It will hold pressure straight away.but full strength talkers a few hours.
 
Bss normally
 
Just read, 3 hours full cure time. That's doable to be honest, but none of the merchants in Lincoln will stock it I bet!

We have a BSS, worth trying them tomorrow.

The thread is definitely quite tight, I can't even get 4 turns of 55 over the whole thread without it binding and becoming impossible to tighten.
 
Thanks all. Need it tomorrow first thing and BSS is round the corner.

That seems like what I need for this job tbh. Give it 3 hours and no leaks. The pipework is feeding the cold water tanks at a small hospital and I've had to leave them isolated but full overnight and tell wards to lock bathrooms till tomorrow. All because Loctite 55 wouldn't work :(
 
Tell you what it's like learning all over again, even though they are still compression fittings.

One positive from today - Yorkshire Xpress fittings are brilliant aren't they, made in seconds! I'm a convert.
 
cr0ft said:
Tell you what it's like learning all over again, even though they are still compression fittings.

One positive from today - Yorkshire Xpress fittings are brilliant aren't they, made in seconds! I'm a convert.
Click to expand...

:D you don't know your born these days

Told you, you would love them
 
Is it normal for the end of the pipe by the fitting to bend onwards very slightly? Nothing leaked but I'm guessing it will do as it's basically a big pneumatic press
 
cr0ft said:
Is it normal for the end of the pipe by the fitting to bend onwards very slightly? Nothing leaked but I'm guessing it will do as it's basically a big pneumatic press
Click to expand...

Yes that's normal

Amy pics ?
 
Will be grabbing some tomorrow when it doesn't leak :)

Won't look that good though!
 
cr0ft said:
I think I might have been a doughnut and roughed up the grooves of the thread. I get the impression you're supposed to run the saw across the threads rather than along the grooves??

Anything better than a saw blade to rough them up? That will take forever on a 2" thread!
Click to expand...
I would just rub the blade from top to bottom of the thread and you will get a pretty nice rough thread which is great for loctite or any other product like horeses hair I guess that's what you guys call it here.
 
Well you leaking yet ?
 
We're there :) tried the Loctite 55 again today. Must have just been a tight thread on the first one. Worked a treat on the second one today :)

Broken my commercial plumbing virginity :)

Non-insulated pipe at the back is mine!

IMG_1074.JPG


IMG_1075.JPG
 
Looks good any reason why you didn't use a f + f lever valve first ??
 
Do you mean on the left hand side of the pics?
 
Oh ok. Would it have saved any joints?

One thing I noticed today is 54mm conpression fittings seem a bit prone to weeping when tightened up!
 
Would of looked better

Cpvc male iron straight into the lever valve

Then an 11/2 to 54mm male iron the other end to convert back to copper

Hope you left the glue 24 hours to dry before water on :D
 
Fair one re aesthetics!

All but the unions were prefabricated off site so glue had a week to dry.

Both union connections got 22 hours before pressure put through it. To be fair nothing coming out at all and we were there tidying up for 45 mins afterwards.

Couldn't do 24hrs for operational reasons but to be fair glue was solid by 22, nice warm plant room to accelerate chemical reaction.
 
cr0ft said:
Fair one re aesthetics!

All but the unions were prefabricated off site so glue had a week to dry.

Both union connections got 22 hours before pressure put through it. To be fair nothing coming out at all and we were there tidying up for 45 mins afterwards.

Couldn't do 24hrs for operational reasons but to be fair glue was solid by 22, nice warm plant room to accelerate chemical reaction.
Click to expand...

Nice one, love a bit of pre fab takes all the worries out

How did you get on tightening 54mm up :D
 
Haha, best summed up by the maintenance guy who popped into the plant room whilst I was doing one up with 2' stilsons - 'Jesus is that sweat on your back??'

I also think I have broken our 9st apprentice..
 
:D should of given him the 12" ones
 
Or a set of wide jaw adjustables. Was tightening up one thread on the floor. He was standing on one stilsons while I did the other. Kept lifting him off the floor lol.

Good lad though, very helpful!
 
cr0ft said:
Oh ok. Would it have saved any joints?

One thing I noticed today is 54mm conpression fittings seem a bit prone to weeping when tightened up!
Click to expand...

If you can use it, Boss white makes it a lot easier. Oil based!
 
Last Plumber said:
If you can use it, Boss white makes it a lot easier. Oil based!
Click to expand...

Can't use it these days as non potable but it's bloody great still

Jet blue v2 I use like boss with slightly more solid but still workable
 
ShaunCorbs said:
Can't use it these days as non potable but it's bloody great still

Jet blue v2 I use like boss with slightly more solid but still workable
Click to expand...

No, I wouldn't use it on Potable Water. Never used it for that.
That's why I said "if you can".
 
TMHM said:
How do you get them off again? Or cant you?
Click to expand...

Yes and no really you can't but if your careful with a grinder you can
 
Yes not supposed to be removable but then if they are as reliable as they were when we installed them can't see you needing to. All joints go together in seconds perfectly. When guns become more affordable I can see them taking off big style. So much less time/hassle than soldering.
 
cr0ft said:
Yes not supposed to be removable but then if they are as reliable as they were when we installed them can't see you needing to. All joints go together in seconds perfectly. When guns become more affordable I can see them taking off big style. So much less time/hassle than soldering.
Click to expand...

TBH I think there affordable you only need several bad joints that suck up an hour or two for it to pay for itself
 
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