Hi all, i have just fitted a new basins to my en-suite and down stairs toilet. hot and cold pressure in both are fine. gone to use the shower which is a mixer and only a dribble of water comes out + the shower pump does not kick in (shower pump is a salamander ct50) presume that i have a airlock, and the pump is in the loft. go into the loft to drain the air valve and the plumber hasnt put any air vents/ bleed valves in the pipe work. how do i go about remove the air from the pump if this is the problem? thanks for your help.