CAN ANYONE HELP ME PLEASE I HAVE JUST TILED MY SHOWER DID NOT RENEW THE SHOWER AFTERWARDS , I HAVE JUST A MANUAL SHOWER HOT AND COLD BUT NOW I BOUGHT NEW SHOWER HEAD HOSE AND SLIDER RAIL TO FIND OUT NOW THAT IT DOES NOT HAVE THE SAME PRESSURE AS MY LAST SHOWER HEAD IVE TRIED 4 DIFFERANT HEADS ...