YUNOVA · Plumbing
Module 11: Estimation and contracting
Plumbing material estimation
Key points
- Measure pipe runs from the drawing and add an allowance for wastage.
- List fittings such as elbows, tees and valves for each point.
- Group materials by size and type to get supplier quotes.
Reading building plumbing drawings
Key points
- Plumbing drawings use symbols for pipes, valves and fixtures.
- Water supply and drainage lines are usually shown separately.
- Check sizes, slopes and levels written on the drawing.
Plumbing codes and standards in India
Key points
- The National Building Code of India has a section on plumbing services.
- BIS standards cover pipes and fittings.
- Local building rules may add their own requirements.
Quoting and billing a plumbing job
Key points
- A quote lists materials, labour and any extra work clearly.
- Agree payment terms before starting the job.
- Bill any changes the customer asks for separately.