If your tap is dripping, then it most likely requires a new washer. Alternatively, if your tap turns on and off with just a quarter turn, then you will need a replacement cartridge (not a new washer). Sourcing these cartridges can be a bit trickier as there are lots of different types and the plumbers' merchant may have to order one in especially.

Typical duration

• Replace tap washer = 30 mins
• Change tap washer if tap can not be locally isolated = 1 hour
• Replace tap cartridge = 30 mins
• Change tap cartridge if tap can not be locally isolated = 1 hour