B-vent pipe.
It is usually rain water that has seeped through the roof, or it could be a leaky pipe or boiler.
first you have to calculate the circumfrance of the 4 inch dryer pipe. Then once you have calculated that you must do the answer times by the hole in which is designated in the roof. This answer will then tell you how easily it will actually be to fit the dryer pipe through the roof. if the answer is higher then 10 you must make the hole in the roof larger. Then reed it through and lock it in place. Then you can dry as many things as you like.
You can tell if the roof vent pipe is clogged by watching for slow drains. If air is unable to help force water out of the system, the water will naturally want to remain in position.
Called the 'exhaust chimney'. It should usually be a double thickness aluminium or steel tube.
If you are talking about a roof water drain pipe to sewer it is illegal. If you are talking about a sink drain pipe well that is where they all connect to so yea.
A pipe extended above the roof level is a soil pipe.
Go to the Carrot Factory, get the blueprint from the roof window, and go in through the waste pipe at the water side.
A crack, crevice, fissure, or hole which admits water or other fluid, or lets it escape; as, a leak in a roof; a leak in a boat; a leak in a gas pipe., The entrance or escape of a fluid through a crack, fissure, or other aperture; as, the leak gained on the ship's pumps., Leaky., To let water or other fluid in or out through a hole, crevice, etc.; as, the cask leaks; the roof leaks; the boat leaks., To enter or escape, as a fluid, through a hole, crevice, etc. ; to pass gradually into, or out of, something; -- usually with in or out.
This is probably an overflow pipe from the cold water tank in the loft.
It allows the drains to flow freely and the stench of the sewer to be sent to the highest point in the roof. That is why p-traps are installed, so the sewer gasses go to the roof vents and not through the water in the traps.
In order for water to flow down a pipe, there must be a vent to allow the air to escape. Above a toilet, on the roof, there is usually a pipe or a vent hood, which is connected to the drain pipe. When the toilet is flushed, the sound of water draining can be heard issuing from this vent. In addition to the above answer, the air rushing through the water may be the cause of the gurgling sound, which is the air escaping through the vent to prevent the build up of air pressure inside your water system.