Water Supply Systems
How potable water systems deliver safe water at the right pressure, followed through a plumbing apprentice on a Hamilton high-rise: the water service, curb stop and meter; static and residual pressure and pressure-reducing valves under the Ontario Building Code Part 7; flow, velocity and friction loss; water supply fixture units and peak demand; sizing supply piping with a pressure budget; hot water storage, mixing valves and recirculation; booster pumps and pressure zones; water hammer arresters and thermal expansion tanks; valves and layered isolation; protecting water quality from lead, stagnation, Legionella and cross-connections; and flushing, disinfection and pressure testing.
PLB-130 12 lessons · 4 h 38 min ▶ Video lessons coming soon
Offered by HSM University · Plumbing
This is the Canadian version of this course. See the American version.
What you'll learn
- Trace a potable water system from the public main through the service, meter and backflow preventer to the fixtures, and explain the jobs the system must do.
- Describe how water services are connected, buried, restrained and separated from sewers, and how meters and their settings are installed.
- Distinguish static from residual pressure, apply the code's maximum and minimum pressures, and install, set and troubleshoot pressure-reducing valves.
- Relate flow, velocity and friction loss, apply velocity limits, and estimate losses in pipe, fittings and devices using friction charts or the Hazen-Williams formula.
- Tally water supply fixture units for private and public fixtures, convert them to peak demand, add continuous flows, and explain diversity and newer demand methods.
- Size supply piping with a pressure budget and an allowable friction rate, check velocity and minimum sizes, and recognize site changes that spend the budget.
- Explain how hot water is heated, stored, tempered and recirculated, size recirculation flow from heat loss, and balance and control a recirculation system.
- Explain when booster pumps are needed, how variable-speed packages work, how they are sized for flow and head, and how tall buildings are divided into pressure zones.
- Explain the causes and size of water hammer and thermal expansion, and select, place, size and check water hammer arresters and expansion tanks.
- Select potable water valves, plan layered isolation, make valves accessible and labelled, and calculate valve pressure drop from flow coefficients.
- Protect water quality through approved and lead-free materials, low water age, Legionella control, clean construction practice and protection against cross-connections.
- Pressure test, flush and disinfect a water system, collect bacteriological samples, commission the system and prepare the records for turnover.
Course content
12 lessons · 4 h 38 min total · final exam
- 1 The potable water system from main to fixture 24 min · quiz
- 2 Water service, curb stop and meters 23 min · quiz
- 3 Pressure: static, residual and pressure-reducing valves 23 min · quiz
- 4 Flow, velocity and friction loss 23 min · quiz
- 5 Water supply fixture units and peak demand 24 min · quiz
- 6 Sizing supply piping 23 min · quiz
- 7 Hot water supply and recirculation 24 min · quiz
- 8 Booster pumps and pressure zones in tall buildings 24 min · quiz
- 9 Water hammer, arresters and thermal expansion 26 min · quiz
- 10 Valves, isolation and access 22 min · quiz
- 11 Protecting water quality 20 min · quiz
- 12 Flushing, disinfection and pressure testing 22 min · quiz
- E Final exam 20 questions
Requirements
Recommended background. You can start any course at any time.
Description
How potable water systems deliver safe water at the right pressure, followed through a plumbing apprentice on a Hamilton high-rise: the water service, curb stop and meter; static and residual pressure and pressure-reducing valves under the Ontario Building Code Part 7; flow, velocity and friction loss; water supply fixture units and peak demand; sizing supply piping with a pressure budget; hot water storage, mixing valves and recirculation; booster pumps and pressure zones; water hammer arresters and thermal expansion tanks; valves and layered isolation; protecting water quality from lead, stagnation, Legionella and cross-connections; and flushing, disinfection and pressure testing.