Gas Leak.... Please help.

[James325]

Hi

I am unable to do the union up tight onto the flow meter in the pic.

The hose union is still slightly loose, despite the nut being up tight.
Is it my cheap r-tech hose? (doesn't leak if direct on r-tech reg)
or have I got a duff flow meter?

which bit is the problem?

 

[keith19]

Dare I go first on this one? Here goes...

I suggest first check if the internal thread has not been cut far enough inside the body of the union. When the union is wound on, the thread may come to an end before the stub pipe is locked tight. In which case try another union.

Or perhaps the thread on the flow meter is too short, and the union bottoms out and hits the base before the stub pipe is locked. Observation should confirm if this is the case or not. If it is, file down the the end of the union nice and square, until it locks the pipe before it bottoms out.

Come on you experts...

 

[James325]

Dare I go first on this one? Here goes...

I suggest first check if the internal thread has not been cut far enough inside the body of the union. When the union is wound on, the thread may come to an end before the stub pipe is locked tight. In which case try another union.

Or perhaps the thread on the flow meter is too short, and the union bottoms out and hits the base before the stub pipe is locked. Observation should confirm if this is the case or not. If it is, file down the the end of the union nice and square, until it locks the pipe before it bottoms out.

Come on you experts...

Well done that man!

after some careful consideration (5 sec) I had a good 4mm off the nut in my lathe and it fits tight!!

Thanks mate, I probably would have picked up another gas hose tomorrow. Saved me a few quid!
James

 

[keith19]

Great! Glad to be able to help.
I used to work on brake pipes - we used to get similar problems!