Sometimes a blockage is a simple one, that can be rectified with a sink plunger, or simply pouring boiling hot water down.
Another great method is by mixing baking soda with vinegar and pouring boiling hot water into the drain.
Please don’t use drain cleaning chemicals including sulphuric acid as they are extremely dangerous, not only do they cause injuries to our operatives, but are very harmful to the environment. If you have used these products prior to our arrival, it’s very important you let us know.