Odd size float valve tap connector?

[mannyfagnet]

Hi.

I have a damaged (frost) angled tap connector that feeds the cold water storage in a loft. Its around 60 years old. Galvanised tank, 15 mm pipework, but all works well so would just like to replace the connector and a short piece of pipe and add a service valve.

Trouble is I don't have the correct size. Its smaller than 1/2 inch.
I'd like to simply collect a replacement and fit it so what is the male end of the protruding fitting likely to be please?

 

[buck51]

Probably 3/8" BSPT

 

[Burnerman]

It could be worthwhile, at a later date, changing everything to 15mm using a new ball valve.....are you sure the galv. tank is really ok? When I see them there's usually 2" of rust in the bottom and the thing is on its last legs (if it had any)
John

 

[doitall]

Not seen a 3/8bsp ballvalve in 53 years.

 

[buck51]

I saw my first one last year, It was in a very old Santon cylindrical cystern type water heater, In a very old School, caretakers room,
The top of the cylinder was only 3" from the cieling, And at 15.30 Hrs on a friday I was not happy, But I managed to remove it without it falling to bits and rewashered it . Yes it had a flat cylindrical float as well,
And I still come accross taps with 3/8 bsp tails regularly.

 

[mannyfagnet]

thanks everyone.

3/8 BSP connector went straight on.

Tanks fine too.

 

[Nige F]

Not seen a 3/8bsp ballvalve in 53 years.

that`s because the tank is 60 yrs old