Motorised valves restrict flow All aspects of plumbing questions and answers, help, tips and information

[billandben]

I've just bought a 22mm Drayton 2-port motorised valve and noticed that although the inlet is 22mm, the outlet seems to be restricted to about 15mm, thereby halving the throughput. This seems to be a bad design. Can anyone recommend a 2-port valve that actually has a full 22mm bore
thanks

[plumbbob]

Honeywell do a two port zone valve which if I remember right is full bore.

I prefer them anyway.

Screwfix part no 31480