HG liquid drain cleaners for discharges does so very safe. Since the product is ready for use, the risk of splashing is much lower. In addition, the obstruction may not deteriorate, what you can when you use powder or granules. HG liquid drain cleaners acts in depth and is especially effective. Of course the plastic pipes are not affected. Pour 300 ml of prudently HG liquid drain cleaners into the drain clogged. Leave the product for about 30 minutes, then rinse with plenty of cold water. In the case of willful obstruction rinse first with warm water and use hot water even after application of the product. If this isn't enough, repeat the treatment, or leave the product for one night. Even unpleasant odors coming from drain traps can be effectively removed with a small dose of HG liquid drain cleaner.