Getting a 90° elbow to securely face the way I need

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Bertie1972

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I'm replacing a 1½" toilet seacock and associated fittings. The new DZR 90° elbow that fits between seacock and hose tail faces 180° out of line when tightened in a trial fit.
What's the best way to achieve a secure fitting which faces the way I need?

Also, (I guess this may be part of the above answer) what's the current thinking re PTFE tape/thread sealant etc?
 
I had this exact problem and there was not enough space for a backnut. I manages to get the orientation right by using some large nylon washers I found in a well known diy store's plumbing section. I think they were actually for waste systems.
 
11/2" bsp brass backnut readily available. Try Google.
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I realise BSP nuts are available, but didn't think it could be relied upon to lock on a BSPT male thread - happy to learn otherwise?

Edit - NormanS, I've just tried the nut from the skin fitting and although its too deep I think your suggestion will work if I buy another one and reduce it to half the depth

Thanks all!
 
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I've always used PTFE tape about 5 turns and tightened up till it's a bit stiff, then tightened some more to achieve the required orientation. This is usually possible if enough 'grunt' is applied but occasionally I couldn't get the orientation correct and had to start again with more or less turns of PTFE.
I can see that a backnut would be more positive but I've never had any pipework fail.
 
You won’t normally see a plumber using 577 as ptfe tape is cheap, but you will rarely see any industrial pipe fitter using anything other than 577, it just works. We use it on water, steam, glycol, gas and refrigerants.

You can also get PTFE cord, cannot remember the loctite code, it works well on large threads,
 
ghostlymoron said:
Our pipefitters always used PTFE tape back in the nineties. This was on galv and black iron pipework. Perhaps loctite wasn't available then.
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You have to remember the nineties is over 20 years ago, things move forward and more advanced practice moves to become the norm. To reliably use PTFE as a standard you need to define how much tape and which part of the thread to cover, not easy to QA, the use of loctite is easy to control. Just like boss white and hemp being little used.
 
Bertie1972 said:
I'm replacing a 1½" toilet seacock and associated fittings. The new DZR 90° elbow that fits between seacock and hose tail faces 180° out of line when tightened in a trial fit.
What's the best way to achieve a secure fitting which faces the way I need?

Also, (I guess this may be part of the above answer) what's the current thinking re PTFE tape/thread sealant etc?
Click to expand...
It is not a pressure fitting so your own answer correct, lots ptf tape, it realy doesnt have to be locked down tight does it. or indeed the lock-tight solution already offered.
 
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