If the trap is clear then the problem is probably in the basin waste system. To begin with, try shifting the blockage with chemicals. If this doesn't work, use a plunger or auger. These solutions also work for a kitchen waste system Tools and materials Chemical cleaner, protective gloves, plunger

Chemical cleaner Follow the instructions provided. Ensure the area is well-ventilated and wear protective gloves . Plunger If chemicals don't work, use a plunger. Put the cup over the plughole and pump up and down.

More information

• Take special care when dealing with caustic chemicals. Splashes may burn skin and clothes. Read usage and safety instructions carefully and wear any protective equipment as directed.
• Help prevent blockages by regularly removing debris from plugholes.
• An auger, as shown below, can also be used for unblocking basin and bath waste systems.