stop end fitting

[poshman]

Hi all, under my electric hob there is a gas tap which is obviously turned off, but just to have extra protection ( in case my live in 5 year old g/daughter finds it ! ) I would like to fit a stop end. the tap looks like it has a male 15mm thread so my question is would a galvanised hexagonal 1/2 BSP hollow cap fit it ? as I cant seem to find any brass fitting on the net chers P M

 

[Charnwood]

Your local plumbers merchant will have 1/2" brass, black iron and galvanised caps (either will do the job) on the shelf, along with gas PTFE tape.

There are dozens (brass) on the net. Even ebay has a plethora of choice.

 

[Jackrae]

One of these perhaps as your gas cock may well be a 15mm compression end, if so then a BSP thread will not fit.

The sketch isn't too clear so you might also need A 15mm compression nut.

http://www.bes.co.uk/products/140.asp#16381

 

[misterdubya]

You have an open end?

 

[Charnwood]

your gas cock may well be a 15mm compression end, if so then a BSP thread will not fit.

Every 15mm compression thread is 1/2" BSPP thread. In 40 years I never came across one that wasn't.
Check facts before making such a claim.

And you've linked to a compression blank. The OP says he has a thread, not a compression joint.

 

[MANDATE]

[quote
Every 15mm compression thread is 1/2" BSPP thread. In 40 years I never came across one that wasn't.
Check facts before making such a claim.

[/quote].
You may never have come across one that wasn't, but I can assure you I have a couple of 15mm compression fittings that are not 1/2 bspp.

 

[Jackrae]

Thanks mandate, you've made the point succinctly.

I be surprised if using a 1/2'BSP blind socket was an "approved" method to seal off a 15mm valve end even if it happened to fit. Surely there is only one correct (approved) way of sealing a compression end and that's with a compression fitting.

15mm was what the OP stated so it'd be reasonable to assume it's a compression fitting

However, what do I know

 

[Charnwood]

the tap looks like it has a male 15mm thread

is what I was working to, but I'm only a retired counter boy, so what do I know.

 

[MANDATE]

the tap looks like it has a male 15mm thread

is what I was working to, but I'm only a retired counter boy, so what do I know.

Yes but threads can be confusing to those without the knowledge.
The diameter can be measured in metric but that does not make it a metric thread. The thread form of metric threads is different to the british standard 'whitworth' so it would be wrong to have a male in metric and the female of 'whitworth' form.
Also difficult to grasp is a 1/2 bsp thread does not measure 1/2 in, because its a thread used on steel pipe with 1/2 bore.