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Unblocking - the Main Drains
When the water draining from one appliance wells up through the waste of another, the trouble probably lies in the main drain or its branches, which channel waste into the sewer. Since waste flows downwards, any blockages in the main drain or soil stack will stop up all appliances above that point. In addition, anything that blocks the vent, which keeps air flowing through the system, will cause waste to drain away sluggishly and there may be an unpleasant odour in the house. London Plumbers will try to plot the course of the pipes in your waste system to help pinpoint the blockage. Once we decide where the obstruction might be , we might try first a rubber plunger on the appliance closest to the trouble spot - this can be effective even if the blockage is in the main soil and waste stack. If that fails , we try cleaning out the stack with a cleaning rod or a drain auger. A blockage below the ground level , in the drain to the sewer can be reached through a gully or inspection chamber - manhole.
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