MDPE to 22mm and stopcock

[MortarThePoint]

I have a 25mm MDPE pipe that I want to connect to 22mm copper and have a stopcock. I could either use a coupler, 25mm MDPE to 22mm copper, and a 22mm stopcock or use a stopcock that has a compression fitting onto the 25mm MDPE itself. How robust is a compression fitting onto the MDPE as that's one hell of a place to have a failure!

 

 

I know Plasson make a combined pushfit adapter and stopcock, but availability is low, the price is high and I'm not so keen on a plastic tap.

Edited 12 hours ago by MortarThePoint

[Mr Punter]

I like the ball valves with a handle.  You may need to adapt to copper first.  The old screw down stopcocks can seize and leak.  We have about 8 bar pressure at home and have a pressure reducing valve as well.

[MortarThePoint]

2 minutes ago, Mr Punter said:

I like the ball valves with a handle.  You may need to adapt to copper first.  The old screw down stopcocks can seize and leak.  We have about 8 bar pressure at home and have a pressure reducing valve as well.

 

I was already thinking I would have a lever handle ball valve, but I was thinking to have it downstream of the stopcock as those stopcocks are so standard I assumed that I'd have to have one for regs.

 

I'll have a PRV downstream as well.

[Gone West]

3 hours ago, MortarThePoint said:

How robust is a compression fitting onto the MDPE as that's one hell of a place to have a failure!

I don't know exactly, but I used a compression elbow on the 25mm MDPE coming into the house. It was ok for the three years we lived there. I didn't use a standard stopcock but a lever ball valve.

 

[JohnMo]

I just used a 25mm to 22mm stop cock. Been installed 6 years - no issues at all.