Is your specialization diametrically different from work on water pipes? So why don't you order a specialized company? We all do something else, but we must learn to use the services of others. Drains and water pipes are here for you too.
Removing obstacles and deposits in piping systems is not a nut for a specialist at all. The companies are equipped with the right technical facilities, machines and monitoring. Everything is easily recorded, and the cause of wastewater drainage quickly resolves.
So don't be afraid to ask for help from professionals. Thanks to their fast and safe interventions, your house or apartment will get a quiet running. The water is a bugger and it can do a bad damage. It is therefore a good reason that water supply and sanitation should also be revised to meet the principles of preventive consumer protection.