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A dwelling house is connected to the public water supply system to provide clean, treated water for the household - Leaving Cert Construction Studies - Question 3 - 2012
Question 3
A dwelling house is connected to the public water supply system to provide clean, treated water for the household. (a) Using a single-line labelled diagram, show th... show full transcript
Worked Solution & Example Answer:A dwelling house is connected to the public water supply system to provide clean, treated water for the household - Leaving Cert Construction Studies - Question 3 - 2012
Step 1
Using a single-line labelled diagram, show the pipework required to supply cold water to a kitchen sink
Answer
To illustrate the pipework setup:
- Start with the Public Mains: Indicate the connection to the water mains at the bottom left of the diagram.
- Draw the Service Pipe: Extend a line from the mains to the Service Pipe leading to the kitchen sink.
- Show the Stop Valve: Place a stop valve along the service pipe, which allows for the stoppage of water flow during maintenance.
- Include the Rising Main: Position a rising main vertically, leading up toward the splice into the sink pipework.
- Label Materials: Indicate that the pipework is made of heavy-duty PVC or polyethylene, and provide a typical pipe size, perhaps 15mm for smaller residential systems.
- Draw the Kitchen Sink: At the end of the service pipe, represent the kitchen sink with a clear label.
Additional labels should include the 'Water Mains', 'Service Pipe', and 'Sink'.
Step 2
Include in your sketch two design details that would prevent the water in the mains supply from freezing during very cold weather
Answer
To prevent the freezing of water in the mains supply:
- Insulated Pipework: Show that at least 600mm of the service pipe is insulated with appropriate insulation material.
- Depth of Pipe: Indicate that the water pipe should be buried at a minimum depth of 1 meter. This depth will help protect the pipe from freezing temperatures above ground.
Step 3
Outline two ways in which the household could reduce the use of treated water from the public water supply
Answer
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Rainwater Harvesting: Install a rainwater harvesting system to collect and use rainwater for non-potable purposes, such as irrigation and flushing toilets.
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Greywater Recycling: Implement a greywater system to recycle water from baths, sinks, and washing machines for irrigation and other household uses, minimizing reliance on treated water from the mains.