If you live in a hard water area such as London, scale can cause serious problems to your drainage pipes. Drainage pipes can quickly accumulate a large amount of scale, especially if the pipes are old and the surface provides a suitable medium for the scale to build up.
If you notice the waste water is being carried more slowly when you empty the sink, this could be indicative of scaled pipes. Scale can reduce the internal diameter of the pipe, so on occasions the pipes may need to be descaled. Descaling of pipes is not a difficult job, but needs to be carried out by drainage professionals in the city where you live. They will first conduct a CCTV survey to find out the extent of the scale and then use a descaling machine which cuts the scale from the inside of the pipe restoring it to its previous internal diameter.
If you haven’t had the drainage pipes that lead form your home checked recently, it is a good idea to give them a once-over. You drainage company will be able to determine if there is a problem and will offer a cost-effective solution.