There are many signs to show that the drainage system has problems, including a blocked manhole Highgate. When you see these signs early, it may save you the money of dealing with an even tougher block and it may also save you much time and effort. You may be able to fix it yourself rather than hire a professional. There are some classic gurgling sounds which you may hear when the toilet is being flushed. They come from the toilet, sink, or shower and they often are flushed by displacing trapped air within the drainage system while the gurgling of trapped air can push up within the water trap. The water level of a toilet, sink or bath can drain slowly while they will continue to rise higher than usual and the water level of the toilet may drop lower compared to what is usual. This is most of the time water which is being displaced or siphoned out of a pan since the problem will be found down the system. Internal venting or smells may be caused because of the water that is being displaced within the sinks or the traps. The defective and blocked manhole Highgate may leak in a sub-floor and it can cause a bad smell in the property. You can try to locate and identify the extent to which the blockage at the drainage has reached, whether external or internal. This may be useful for homeowners and it could help you save a few pounds with a contractor who works on an hourly rate if you can point out exactly where the problem is. There are some methods that you can try yourself or you can call a professional with the proper equipment if you prefer them to handle it.