gas meter union nut size?

[bluesky]

Dear all,

I tried to replace half meter length of lead pipe with copper pipe this morning, i removed the lead together with two nuts, thought just new copper pipe and two new 22mm nuts and should be easy. then realised that the nut size is slightly bigger than 22mm nut, brought the nuts to BSS , PTS, but they all never saw that nut before, they showed me the standard gas union, is much bigger than the nut i have, i am really confused, is this kind of nut(slightly bigger than 22mm) not in BS codes all French one? anyone have seen it before?


cheers in advance

 

[tamz]

It is a 3/4" BS 746.

Gas Meter Unions, Adaptors & Fittings

See the link or look for a transco van.

 

[metaldust9]

just buy a meter union and swap the lot

 

[diamondgas]

In my days of meter fitting they were known as 5 lite unions ... Check out the link 'tamz' has posted ...

 

[PETE 123]

Light (as in gas) so 5 light size would be ok to 5x gas lights

 

[Ermintrude]

GS 10 is union GS 5 is ecv?