John wrote:
Hard to describe but think pressure differentials. They are a real
pain in the proverbial. Replace it with another type.

Agreed - spawn of the devil. Agin nature. Bring back the good old
ball valve.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk


.....so if you can't be bothered to understand it then you should
condemn it?

But I do understand it. And I've had to sort out loads of the buggers.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk