Pipe connection for 1940/50s imperial StopCock (1/2" copper pipe).

[Popsk]

Could anyone please identify the thread and connection required to fit this old stopcock (photo attached), the problem thread is 0.894" across the thread, with 14 threads per inch.
The feed pipe into the stopcock is 1/2" copper, and is approximately 4" long - from the concrete floor to the existing in stopcock connection. My problem is that the out connection nut is missing and I am wanting to connect a 15mm pipe to the stopcock to feed an external garden tap.
I had previously been advised, by a friend, that I required a 1/2" bsp tap connection, purchased one - too small, a further friend advised that I would need a 3/4" bsp tap connection, again I purchased one - it was too large.
Is there anything currently available that will fit the bill?

 

[Harvest Fields]

Would probably be easier to fit a whole new stop tap mate.

 

[snowhead]

It's quite posibly 5/8" but you wont be able to buy a plumbing Compression nut that size nowadays.
That size is still used in Hydraulic fittings.

New tap as above is the solution.
The thread was used on some bib tap originally.

 

[Popsk]

It's quite posibly 5/8" but you wont be able to buy a plumbing Compression nut that size nowadays.
That size is still used in Hydraulic fittings.

New tap as above is the solution.
The thread was used on some bib tap originally.

Thanks Snowhead, I'll follow that one up.
Popsk

 

[JCplumb]

If you're desperate you could try a scrap metal merchants and ask to look through their brass bin. An old stop tap could have the part you need.

 

[Popsk]

If you're desperate you could try a scrap metal merchants and ask to look through their brass bin. An old stop tap could have the part you need.

Good idea JC, hadn't thought of that, thanks.
Popsk

 

[Popsk]

Would probably be easier to fit a whole new stop tap mate.

Bit of a prob with that one HF, I'm having to dig-out the external stopcock, 50yrs solid soil buildup from path-cover to 3' down, and still digging with no sign of the stop valve yet!

 

[Harvest Fields]

Bit of a prob with that one HF, I'm having to dig-out the external stopcock, 50yrs solid soil buildup from path-cover to 3' down, and still digging with no sign of the stop valve yet!

We have all been there. It’s normally about an arms length down. Keep going it is there.

 

[townfanjon]

Dont waste your time , new stoptap !!

 

[Popsk]

Dont waste your time , new stoptap !!

Thanks townfanjon, I had hoped it wouldn't come to that, as the stop valve in the street is proving rather elusive.
Bytheway, I like your hat ;-)

 

[ShaunCorbs]

Call the water board out then say you can’t find the stop tap

They will find it and dig it out for you

 

[Popsk]

Call the water board out then say you can’t find the stop tap

They will find it and dig it out for you

Yes everything seems tobe pointing in that direction Shaun. Would they charge for this service?

 

[ShaunCorbs]

Yes everything seems tobe pointing in that direction Shaun. Would they charge for this service?

They shouldn’t as you require access to the outside stop tap

 

[Harvest Fields]

Call the water board out then say you can’t find the stop tap

They will find it and dig it out for you

So why the heck have I been digging them out for years?

 

[ShaunCorbs]

So why the heck have I been digging them out for years?

Because you can’t be bother to wait for them ?

 

[snowhead]

Would they charge for this service?

The stop tap belongs to them and they'll probably test it to check it works without leaking once dug out.
They may even put a new sleeve in the hole.

 

[Popsk]

Because you can’t be bother to wait for them ?

Thanks Shaun, it looks very much like I'll have to bit the bullet and call in the heavy squad then.

 

[Popsk]

Could I thank all you lads for helping an old codger out

 

[Harvest Fields]

Could I thank all you lads for helping an old codger out

You’re welcome mate

 

[king of pipes]

I had Essex and Suffolk water out this week to find and isolate a old lead incoming main there was no charge, and was sorted out very quickly . Kop