Pipework Headache

As 'A' in attached. Got an existing setup where isolation valve and connected water pipe are in a boxed and tiled area.

Theres also existing concrete above (gap shown).

Wanting a way (as 'B') to put some sort of thread connected double elbow (ideally without pipework between) and another isolation valve thread connected to elbow as dont want to break in to boxed and tiled existing area. Cant move existing isolation valve, so only got thread end to work with.

Piccy attached

 

I only put a new blue isolation valve as wanting to connect a new flexi tap pipe to it. Unless 2 isolation valves is bad practice?. I suppose something that has same double screw ends as an isolation valve, but no actual valve if such thing existed?.

 

In fact its similar to thread connecting a new flexi pipe to existing isolation valve, but flexi pipe needing thread ends both the same!!. Then something to connect to end of the flexi pipe so another flexi pipe could be thread connected to the previously mentioned 'something' joining piece.

Think of it as making a tap flexi pipe 'double length' but no new copper pipe needed

 

So .... how to "connect 2 flexi tails together?" for extra length. Then 1 end to mono tap and other to existing isolation valve

 

not got photo as not there right now.. apologies

 

not got photo as not there right now.. apologies

 

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