Sometimes people mistake a blocked sink for a blocked drain. The two are very different as one system is an internal small waste pipe and the other is an outside, complete house drainage system.
There are a variety of methods that we use for clearing stubborn blockages. Our most reliable is the trusty plunger, but sometimes we require that little bit extra. Whatever is causing the blockage we have the right tool for the job.
We carry a micro-bore drill with us at all times. This self contained unit is effectively a commercial standard snake attached to a drill that can corkscrew its way down a waste pipe and through most blockages. It can go up to 25 feet so even those blockages under the floor are no problem for us.