Q. The best system of plumbing of drainage work in building is
Solution:
- In a two-pipe system the WC waste is fed into a large diameter vertical soil pipe, seperate to the other waste water.
The key features of this system are: - WC waste is fed into a large bore soil pipe, which leads directly to the sewage network, and often runs down the outside wall of a property
Remaining waste waters from washbasins, bath and kitchen sink etc are combined via seperate smaller bore branch pipes in a gully just below ground level. - To prevent back siphoning and to discharge any gases from the drains, the large soil pipe is vented to the outside above the guttering.
- All appliances contain a u-bend trap full of water to prevent drain smells penetrating the house.
- The waste from the gully finally meets the soil water a short distance from the property on its way to the sewers.
- At this meeting point will be an inspection chamber with a manhole cover.
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