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Questions and Answers
What is essential to prepare before starting plumbing work?
Drainage plans
What is the correct fall for a 10cm pipe?
Which of the following is a valid definition of sewage?
The sewage may include storm sewage, infiltration, and inflow.
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What type of pipe conveys soil waste?
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Match the following terms with their definitions:
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What is a ventilation pipe?
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Study Notes
House Drainage
- The text focuses on the importance of preparing detailed drainage plans before starting the plumbing work.
- The text emphasizes the necessity of quick removal of sewage from the building.
- The text provides guidance on the fall of pipes for different pipe sizes:
- 1 in 40 for 10cm pipe
- 1 in 60 for 15cm pipe
- 1 in 90 for 23cm pipe
Points to Consider While Preparing Drainage Plans
- The drainage system should be properly ventilated on the house side.
- All drains should be laid to ensure future safety.
- Drains should be laid for easy future extension.
- Rainwater pipes, sweeping from the house and bath water, should discharge over gully traps.
- All soil pipes should be carried directly to the manholes without gully traps.
Sewage and Sewer
- Sewage: The liquid waste conveyed through a conduit (pipe). It can include domestic, industrial, storm, infiltration, and inflow discharges.
- Sewer: The conduit that carries the sewage.
Domestic and Sanitary Sewage
- This type of sewage originates from sanitary fittings of residences, commercial or industrial buildings, and institutions.
Industrial Sewage
- It encompasses liquid discharges from industrial processes.
Storm Sewer
- This refers to the flow derived from rainfall.
Infiltration
- Infiltration is the water that enters the sewer from the ground through leaks.
Inflow
- Inflow is the water that enters the sewer from the surface during rainfall through connections to roof or basement drains.
Soil Waste
- The waste products of the human body are called soil waste.
Soil Pipe
- A pipe that conveys soil waste.
Soil Appliances
- Fittings, such as WCs and urinal pans, that receive soil waste.
Waste Appliances
- Fittings that receive wastewater, including wash basins, baths, showers, trays, bidets, drinking fountains, and sinks.
Waste Pipe
- A pipe that conveys wastewater, either alone or together with rainwater.
Discharge Pipe
- A pipe that conveys discharges from sanitary appliances.
Ventilation Pipe
- A pipe open to external air at the highest point that ventilates a drainage system by connection to a drain, a soil pipe, or a waste pipe. It does not convey soil water or rainwater.
Stack
- A main vertical pipe.
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Description
This quiz covers essential principles and guidelines for effective house drainage planning. It highlights the importance of detailed drainage plans, the proper fall of pipes, and considerations for a safe and ventilated drainage system. Test your understanding of sewage systems and the differences between sewage and sewers.
