Sink. Tuesday , July 25th , 2017 - 05:28:18 AM
Turn off the water by closing the angle stops under the sink. By turning off one side at a time, you will be able to determine which one leaks, but I always just replace them both.
When designing a waste system, care has to be taken to ensure that the water in the traps cannot be sucked out so breaking the seal against smells. This can happen if waste water rushes through the branch pipe leading from the trap (or through other pipes connected to this branch) quickly enough to create sufficient suction to pull the water out of the trap. To guard against unsealing, the top of the soil-stack is left open. It should, however, be fitted with a cage to stop birds nesting in it and stopping up the open end. (Technically, the length of pipe above the highest branch connection to it is called a vent pipe.) In the single-stack waste system, there are other design constraints - the slope, length and diameter of branch pipes, the position of their connections to the soil-stack, and the radius of the bend at the foot of the soil-stack all have to be worked out carefully in order to meet the requirements of the Building Regulations.
If the plunger does not clear the clog, try a sink auger. These devices can be purchased for about $20 each in any hardware store and can save you from having to call a plumber. Each device works a little bit differently, so be sure to follow the directions that come with the device.
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