Joining 15mm isolator valve to 1/2" BSP male tap tail.

[duffsparky]

I've started a discussion at- http://www.ukplumbersforums.co.uk/plumbing-forum/21292-shower-pipe-sizes.html#post155539 - regarding shower pipe sizes and fittings, I didn't realise there is a seperate Fittings & Pipe forum.

Any way I want to connect a 15mm x 15mm full bore isolating valve to the 1/2" male connections on my shower mixer valve. I need to keep the assembly as short as possible and don't have sufficient room to connect the two together as normal. I want to know if I could get away with fitting a 1/2" x 1/2" female/female socket, see middle picture fig 2 below
fig1 fig 2 fig 3

Obviously have to remove the 15mm conpression nut and olive and fit a seal, possibly and "O" ring or fibre washer, between the valve and the 1/2" male tap tail.

I've looked for isovalves that are 15mm X 1/2" but they all seem to be small bore and I want to use full bore. If I put the valves elsewhere there will be a problem accessing them. I've looked at using 15mm X 1/2" adapter but they are too long, I've also looked at using 22mm X 3/4" isovalves fitted with 3/4" x 1/2" reducers but again I think they'll be too long.

As an alternative I've found this fitting 15mm O/D tail x 1/2" BSP, made by JG in there Speedfit range, see photo fig4 below
fig4

Here's what I'm trying to acheive, see fig5. By the way the left hand pipe in not in its correct location
fig5

Any advice would be much appreciated.

Thanks

 

[SimonG]

Why do you want the valves on the horizontal, can you not fit in vertical or fit valves in airing cupboard? Make life easier as you wont be able to get at valves once tiled etc.

 

[Blake]

as above, I would not want to put iso valves there. Put them in the loft for easy access, plus if they leak, you can visually see it.

 

[WHPES]

Pointless putting valves there - You can't get to them.

Put them somewhere accessible.

 

[Barry98]

id be tempted to solder them joints as well otherwise they will leak too 🙂

 

[royston]

yes as above threads, a very strange place to put them iso valves.

 

[duffsparky]

Unless I put the valves under the floor or in the walls they'll have to go under the shelf which sits in the corner on top of the corner mounting bracket. There is sufficient space to access the valves and if they leak the water will drip into the shower tray. I just need a suitable way of joining the valves, without using the olive and compression nut on one end, to the 1/2" male inlet of the mixer valve.

Cheers

 

[AWheating]

wont a ballafix swivel fit ?

 

[duffsparky]

wont a ballafix swivel fit ?

Length wise that type would be ideal, however, the only ones I can find are all small bore and I want full bore. Anyway I have found a solution and pressure tested it and all seems OK.

Thank you to all who have contributed.

 

[CP1111]

What was the solution?

 

[JCplumb]

I doubt duff sparky will be back to tell you, however the right way to do it is in the comments above, as a side note, I would have done away with those horrible offset connectors and brought the copper out at 150 centres into shower fixings.

 

[duffsparky]

Sadly, shortly after my last post, divorce rose its ugly head and I didn't get to finish the installation. I can't remember what my solution was and the above suggestions where not ideal because they significantly increased the pipe runs in order to keep them out of sight, which was something I was trying to avoid. Sorry I can't help.