32mm MDPE and Stop Cock Query?

[veedee]

Replacing existing lead pipe

Will be using 32mm MDPE pipe as opposed to 25mm

Internally, i need to connect the MDPE pipe to a stop cock

But what size stop cock do I use?

I have 3 showers and an unvented cylinder in my property so I want to maximise the pressure/flow rate etc

 

[Madrab]

Reduce 35mm to 22mm then into a good quality full bore lever valve. If you really want to then you could reduce to 28mm with a 28mm lever valve and run that up to the UV control set if there are other branches to CW outlets to max out the flow and keep the system as quiet as possible but 22mm at a min right up to the cylinder.