He did remove a foil water pipe vent. Could this be creating a vacuum and then causing the shower and sink waste issues as they both feed into the soil pipe?
I've just had a Quadrant steam/shower cabin fitted. When used the shower tray fills with water very quickly and then takes 6 minutes to drain away! The shower tray has it's own little trap and the plumber also fitted a u bend underneath the floor so the fall to soil pipe is steady but not steep. The...
