There are 2 nuts,1 disconnects the trap from the outlet pipe and the other is on the Ubend of the trap.
Remove Ubend and check it is clear, no harm on wet vac on outlet pipe either whilst you are at it.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local