I had a look at a job tonight new kitchen and conservatory revap everything being altered and swapped around plumbing heating ect , while i was there they asked me to have a look at the shower pump which is a few years old ? they recently had their shower room redone but the new shower doesn't work as it should and the installer has walked away from the problem saying they chose it so it their problem it doesn't work as expected on the system , i think it needs a negative head pump so looking for a tried and tested one which will sort the problem the pipework goes up changes direction under hallway floor before dropping to the shower 8m or so all in 22mmm copper , theres also a ensuite which seems to work ok but has a traditional look shower mixer the new one is a modern look so guessing it needs at least 1 bar behind it to operate effectively so a 2bar + any recommendations chaps ? Cheers kop