Devany coughed up some electrons that declared:

On the ball cock valve pictured he


http://www.screwfix.com/prods/88427/...rn-Ball-Valve#

http://tinyurl.com/my2rty

Can someone explain what the red bit is for?

After some recent bodging (sp?), I took it off and it appears to have
made 'no difference'. Thought I'd better make sure.

Thanks

Sure it's not a spare nozzel - high pressure vs low pressure?