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Just want to say thanks to you all before this thread becomes Benny Hill-esque

Thanks for the help chaps. I cant get my head round the idea of loads of pressure and no flow rate. Does it mean you can have a dribble of water but enough pressure to disperse a crowd of Poll Tax rioters? Anyway, if I test flow with a weir guage and pressure with a pressure guage what are...

Hi all. I want to install a cylinder and conventional boiler, and replace the tank in the loft with an expansion vessel. I dont know what makes to buy yet so I wondered if there is a general ideal incomming mains pressure required for good operation of such a system and how can I test this...