½" to 15mm

[marshman]

will the old ½ inch pipe, compression fitting nut & olive fit straight on to ( in to) a new 15mm compression equal tee.
or do I have to get a female 15mm to ½ coupler and if so will the old compression nut fit the threads of the new coupler,
this is the old stop cock compression nut that I would like to reuse.

 

[Steve69the69Gas]

I would cut the olive off and use new, could be diff thread.

 

[buck51]

If I have read your post correctly, You wont to reuse the old nut and olive that is still on the old half inch tube were you have removed the old stop tap, and fit a new tee, if so then the answer is no, the old stop tap nut will probably have a fine thead, and the new tee will be half inch bsp

 

[marshman]

dam, I've got about 20mm of old ½ inch that's sweated into the lead mains and I think after all these years I'll have to cut the ½" pipe
to get the olive off, and I was going to change it live,

thanks for your posts

anyone know if the ( I think it was ) 200ml pipe freeze tins for up to 15mm will freeze this stub or the lead mains. (on screwfix)

 

[Steve69the69Gas]

switch the mains off and hacksaw the olive off.

 

[marshman]

it is the mains stop cock.

 

[baxpoti]

hacksaw the olive off.

Wake up Marshman!

You cut the olive not the pipe

 

[Steve69the69Gas]

turn it off in the road if you can find it

 

[swbjackson]

Get yourself a turnkey and shut it off in the street. If you try and freeze it and the plug melts or shifts while you are working on it you are in for a soaking.

Mike

 

[marshman]

hacksaw the olive off.

Wake up Marshman!

You cut the olive not the pipe

doh

 

[buck51]

Why dont you tell us the full story in the first place?
Why do you want to change the stop cock?
If it wont turn off fully because the washer as gone, then turn it off as best you can and fit a new second stop tap above it

 

[marshman]

there is no other stop cock, its an old place I live in.

 

[Steve69the69Gas]

there will be outside.

 

[marshman]

seal on the stem has gone, it will not tighten down anymore so it leaks
need to run 2 new feed from this while my trench is open on my under pin
the old pipe runs in a duct just under the kitchen floor as the floor will
be coming out (in about 2 years) i'm going to run the new pipes out side,
old pipe is tee'd off under floor, one to k'sink then it goes on to the back
door there it comes up against the wall behind stud work and goes up
the wall to the loft to feed the header tank, I have this black plastic pipe exposed from the trench so I will joint to this here with the new and cap the flow end from the sink side.
the other feed will go through the duct I put in and connect under the sink
at a later date.
looks like my only other option is to cut the lead and join to it in plastic.

 

[marshman]

there will be outside.

been living here 20 odd years and not found other, this one is just outside
the kitchen wall so really its down to the water board to change
but I need to get on with my under pin so I would like to change this
tuesday morning.