Most drain cleaners advise waiting 15 minutes or more after pouring the product into the drain before flushing it with hot water if your drain is still clogged afterward, you may need to repeat the process. Enjoy catch-up tv, on-demand films and apps with one of these superb streaming boxes. Depends on the size of your house and how you use hot water. We have great offers in your area not your location? Useful efficiency (lhv - rated power) - average temperature 70â°c. Dead skin cells, soap.