How To Connect This To This?

[Toppers]

I have a stab of 15mm plastic pipe with an isolator connected to the mains and need to connect the plastic fitting for a water cooler to it, both fittings are of a different size with the white plastic water cooler one being the larger, what do I need to do to make the connection?

[Construction Channel]

You need one of these 

 

Europart Universal Straight Compression Fit Valve Tap, 3/4-Inch x 15 mm, Pack of 1 https://www.amazon.co.uk/dp/B0169N9F02/ref=cm_sw_r_cp_apa_i_y7jaEbF9XNWVY

[Toppers]

12 minutes ago, Construction Channel said:

You need one of these 

 

Europart Universal Straight Compression Fit Valve Tap, 3/4-Inch x 15 mm, Pack of 1 https://www.amazon.co.uk/dp/B0169N9F02/ref=cm_sw_r_cp_apa_i_y7jaEbF9XNWVY

 

Superb that looks perfect, many thanks.

[SiBee]

Can also be sourced from all the usual diy and plumbers merchants. Ask for a washing machine valve. It looks like a 3/4” bsp thread, it’s nothing unusual ?

[JFDIY]

Should be able to isolate the supply and swap that isolator to avoid unnecessary joins etc.