Welding Regulator - which JG fitting

Bigcol49 · Oct 19, 2018

peebee said:
Come on "Bigcol49". I'm sure you were on that recent conversation where someone had got a "G1/2" (BSPP 1/2") regulator and was being told to just tighten it on to a W21.8 thread and let the metal deform to shape (eeek!). I've used G5/8 thread with a good bit of PTFE tape but it is a bit loose and I'd only do it for low pressure (<5BAR, which ain't that low).

Don't give the impression we're the "blind leading the blind". Even when we think that is exactly what we are!

Hi!
I don't recall the conversation you mention. I don't understand the thread sizes you quote. I simply bought my regulator and attached it to my bottle.

peebee said:
I couldn't see "UK" on this. I think you've inadvertently linked the wrong one. Being Chinese they will have a number of variations but they usually link "UK" with "W21.8". The old "Midget Widget" cylinders had G1/2 threads, as did the old "Sodastream" cylinders (the Aussy/NZ ones still are), but you can't get these any longer. They use "CGA320" in the States, whatever that is.

The company is based in Cheadle Hulme so I assume that when they refer to pub gas bottles, they are referring to UK bottles.

Wish I hadn't bothered replying

peebee · Oct 19, 2018

Bigcol49 said:
Hi!
I don't recall the conversation you mention. I don't understand the thread sizes you quote. I simply bought my regulator and attached it to my bottle.

You don't understand them? Tell me someone who does! Take that designation: The "W" stands for "Whitworth" the guy who devised that thread-form in the mid-19th century. The "21.8" is in millimetres. Hang-on, there's something not right about that!

Bigcol49 said:
The company is based in Cheadle Hulme so I assume that when they refer to pub gas bottles, they are referring to UK bottles.

There's a name for that … no good can't remember it just now. Look closer, you'll see it's Chinese ("from Guangzhou, China"). They have folk manning UK addresses that act as sort of "clearing houses" which provides them some advantage (not provides us some advantage!). I think a recent "Chinese" order I made was posted from somewhere in Birmingham. If you actually follow these premises up I bet you find a Chinese take-away!

Of course you don't wish you hadn't replied! Which reminds me, I haven't dropped a clanger for a while - I'm probably due one very soon ...

Bigcol49 · Oct 19, 2018

Hi @peebee
I understand ehat's happened! The first reg that I linked to was a Chinese one on Fleabay.
In a later reply I linked to one on Amazon from the same supplier as Horners' first, unsuitable, reg.

peebee · Oct 19, 2018

Bigcol49 said:
Hi @peebee
I understand ehat's happened! The first reg that I linked to was a Chinese one on Fleabay.
In a later reply I linked to one on Amazon from the same supplier as Horners' first, unsuitable, reg.

It's worrying how fast Amazon are becoming like eBay. I guess it troubles eBay even more.

How do you get them person links? Like @peebee. I can do them very manually, but it's a pain. PM answer please, don't really want to clutter this thread with my incompetence.