Domestic mains water stopcock size

[EBrant]

Hello
Can someone please help me with the following question.

I live in a house built around 1950

The old stopcock looks knackered and I want to replace. I can turn the water off in the street to my house as the water board man left me a key to the manhole

Now I am not 100% sure about the size of the incoming main to my kitchen, it looks old and has what looks like very old chunky compression fitting, therefore would appear imperial. However I have measured the diameter of the pipe the best I can and it is over 1/4 and under 1/2 inch and very very close to 15mm

Basically is their an old imperial pipe which is very close to 15mm, and if so what size please?

Thanks
EBrant

 

[kris]

Normally your incoming main is 22mm but you must have 1/2"" main,

 

[Ermintrude]

Just buy 15mm compression one

 

[Chalked]

Could be 3/8.
measure before cutting!

 

[turnpin]

make your post total to ten or more then send a picture and we be able to assist you more...regards Turnpin:smile5:

 

[EBrant]

make your post total to ten or more then send a picture and we be able to assist you more...regards Turnpin:smile5:

Thanks everyone I will take a picture and upload tomorrow.

There was a suggestion above of 3/8 (thanks for the suggestion) but if I worked that out correctly 3/8 inch is 9.525 mm e.g. 25.4 / 8 X 3 = 9.525 so cannot be 3/8. I think a 15mm compression fitting may do the job, but will upload a picture along side a piece of 15mm pipe (if I can find one)

Thanks All
E Brant

 

[AWheating]

fit a new tap after the knackerd one?

if its very thick 1/2 you may need a 16mm to 15mm compression or a socket forming tool to make a 15mm socket to sweat.

 

[EBrant]

fit a new tap after the knackerd one?

if its very thick 1/2 you may need a 16mm to 15mm compression or a socket forming tool to make a 15mm socket to sweat.

Thanks All

Having taken a closer look at it, I am sure it is 1 5/8'' pipe which = 15.875mm (not sure if a 15mm olive will fit over it) I will check with my local plumbers merchant to see if they have 5/8'' to metric compression joint, or as above if I can get a 16mm or 5/8'' olive and use with a 15mm compression joint

Thanks everyone
EBrant

 

[jtsplumbing]

Are you sure its copper and not screwed iron ??

 

[Chalked]

If it's 15.8mm, and copper. That is the outside diameter of old imperial sized copper.
If it is, a compression fitting will do fine.

 

[wetdrip]

Jeez......!
Buy this and the measure properly.
6" 150mm Digital LCD Vernier Caliper Gauge Micrometer Electronic Measuring Tool | eBay

 

[EBrant]

If it's 15.8mm, and copper. That is the outside diameter of old imperial sized copper.
If it is, a compression fitting will do fine.

Hello All
Firstly thanks to everyone for the replies

I am 100% sure it is copper (cleaned up a section directly below the current stopcock)

I recon this is the answer, thanks Chalked 🙂 , do you mean a standard 15mm compression fitting should do (e.g. olive will squeeze over 15.8mm pipe)

Thanks again
E Brant

 

[Chalked]

Hello All
Firstly thanks to everyone for the replies

I am 100% sure it is copper (cleaned up a section directly below the current stopcock)

I recon this is the answer, thanks Chalked 🙂 , do you mean a standard 15mm compression fitting should do (e.g. olive will squeeze over 15.8mm pipe)

Thanks again
E Brant

you can get 1/2 imperial compression rings, but a 15mm one will fit.