Float valve? Help please

[Alec_t]

What are the chances that the existing nut is imperial?

A possibility. The nut profile looks like it might be a Conex brand valve which, if I recall correctly, used to have a non-standard/Imperial thread.

 

[avonmouth]

The nut will be imperial because the ballcock is 1/2 BSP and the nut is screwed onto it.
It won't make any difference to what you want to do..Just change the ballcock and add an isolating valve.

 

[CountryFan]

The nut will be imperial because the ballcock is 1/2 BSP and the nut is screwed onto it.
It won't make any difference to what you want to do..Just change the ballcock and add an isolating valve.

Plenty of 15mm compression nuts will screw onto 1/2"

 

[avonmouth]

Plenty of 15mm compression nuts will screw onto 1/2"

Exactly.....lots are BSP thread as is the one in the photo.That is why i said it's a straightforward job.

 

[johnny2007]

I think I'm going to cut the horizontal pipe and solder a new piece so to get a brand new connection and service valve.
Or, if the new service valve is long enough, just cut what needed on the right of the existing tap connector.
I can see PTFE tape on that nut, so maybe it's already given problems in the past (deformed olive?) and I don't want to risk spending all day on a 20 minute job.
What do you think?

 

[denso13]

What do you think?

Personally, I'd change the ball valve only, and only if required. A ball valve repair must be the most common plumbing task, I wouldn't over think it. But you could of course go as far as you like.

 

[dilalio]

Only in the plumbing forum!
But, I guess it's easy for us when we've a van full of odds and sods and the know-how to hurdle whatever obstacle is out in front of us...

I get it all the time in my local merchants, where I drink a lot of tea, behind the counter... "what do I need to need to connect this - to this?"

"a fookin plumber" is my usual quib!

 

[johnny2007]

Only in the plumbing forum!
But, I guess it's easy for us when we've a van full of odds and sods and the know-how to hurdle whatever obstacle is out in front of us...

I get it all the time in my local merchants, where I drink a lot of tea, behind the counter... "what do I need to need to connect this - to this?"

"a fookin plumber" is my usual quib!

I tried to get a plumber for her but I couldn't. I told her not to get anyone from checkabodger or from the blue van company and I think that was good advice.
Now, as you're a plumber how many times have you gone to a job prepared only one thing only to find out the all the rest that was disturbed was leaking after you finished?
Isn't it easier to just change what's needed and add a service valve to that pipe?

 

[dilalio]

I tried to get a plumber for her but I couldn't. I told her not to get anyone from checkabodger or from the blue van company and I think that was good advice.
Now, as you're a plumber how many times have you gone to a job prepared only one thing only to find out the all the rest that was disturbed was leaking after you finished?
Isn't it easier to just change what's needed and add a service valve to that pipe?

I don't leave leaks.
They may occur post visit due to expansion/contractions/pressure fluctuations, but I check and recheck there are none whilst I'm there.