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55 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What sides are the cold and hot water lines typically located for a faucet/valve? |
The cold water control is located on the right-hand side of the faucet The hot water control is located on the left-hand side of the faucet |
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At what length does a hot water line need a recirculation connected to it? |
30m in developed length or it supplies more than four stories |
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What is the purpose of a recirculation line? |
To return the cool water that is in the hot water line back to the hot water tank and replace the water in the line with hot water |
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What should be installed on the return side of a system next to the tank to prevent backflow? |
A check valve |
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What is heat tracing? |
Self-regulating heat tape that can be used as another technique instead of recirculation systems |
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What should a water service pipe have installed where it enters the building? |
A shut off valve |
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What is required on the water supply pipe to every water closet? |
A shutoff valve |
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What is a riser? |
A water distribution pipe that extends through at least one full story. |
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In buildings other than single- or multi family residential applications, isolation valves should be installed where? |
Isolation valves should be installed on every fixture, or should at least have a valve located to isolated the water serving the room |
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What outside hose Bibb is best? |
Non-freeze hose Bibb |
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What is the easiest way to protect a hose Bibb? |
A hose end vacuum breaker |
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What is installed in a water closet tank to prevent harmful products from entering the potable water systemv |
An anti-siphon ball cock |
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What is the minimum length of an “air gap”? |
Must not be less than two times the spout diameter of a faucet, or at least 25mm (1”) |
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Where is an air gap not permitted? |
On a fixture that is situated in a noxious (harmful or toxic) environment |
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What is an “air break”? |
An indirect connection of a drain from an appliance containing potable water and the drainage sytem. |
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What is the minimum length of an “air break”? |
One pipe diameter, or at least 25mm (1”) |
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What is the maximum operating temperature of Polyethylene (PE) tube? |
130°F (54°C) |
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What is Polyethylene (PE) tube approved for? |
Water service pipe and cold water applications only. |
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If a check valve or a backflow preventer are installed on a water service entering the building, is the system an open or closed system? |
Closed system |
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What can sudden starting or stopping of water cause? |
Water hammer |
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What device can remedy water hammer? |
A mechanical shock arrestor (hammer arrestor) |
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Where should an air chamber be installed? |
At the highest point in the water distribution system or near the appliance that causes the most water hammer |
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Are potable and non-potable water systems permitted to be connected together |
No |
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Is a private water supply system allowed to be connected to a public water system? |
No |
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What are some water treatment devices used? |
Water softeners, iron filters, sand filters, and carbon filters |
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How should the drains be connected for water treatment devices? |
Must be indirectly connected to the drainage system to prevent contamination of the filter bed and the water passing through the filter bed |
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What does flushing a water system do after installation? |
Removes traces of flux, dirt, or other foreign matter that may have found its way into the piping being installed |
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What should be done before flushing a water system? |
The aerator should be removed from the spouts of faucets |
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What kind of test is common with water systems? |
A water test |
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If a water test is not able to be done, what’s an alternative test used? |
An air test |
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What is the test pressure for an air test? How long must the pressure hold for? |
700 kPa (100psi) 2 hours |
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What can cause pressure drop? |
Friction loss |
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What is the maximum static pressure allowed in an occupied building? |
550 kPag (80psig) |
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When the pressure exceeds 550 kPag, what kind of valve should be installed before the meter of the building? |
Pressure-reducing valve (PRV) |
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Should the PRV be installed upstream or downstream of the meter? |
Upstream of the meter to protect the meter from high pressures |
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What is installed around the PRV, in case it needs repairs? |
A bypass loop with a throttling type valve |
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What type of valve is typically used for throttling? |
Globe valve |
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What is the minimum pressure for a fixture? |
50 kPag |
In kPag |
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What maximum percentage of lead content can be in a solder when installing copper water distribution lines? |
0.2% lead content |
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What is a house meter spacer normally made up of? |
Two 6” galvanized nipples and a union |
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What is the minimum amount of shut-off valves required for a bypass? |
Three |
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What kind of valves should be used when constructing a bypass? |
Gate or ball valves because their full-flow design reduces pressure loss |
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Where the water service exceeds 1 1/4”, what type of valve needs to be provided? |
An independent drain valve |
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Where may the “simplified sizing method” of water lines be used? |
When the buildings are either one or two dwelling units or row houses that have separate water services |
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When sizing a water distribution system using the simplified method, what is the maximum total developed length? |
Not more than 90 m |
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When using the simplified method, what is the minimum static pressure at the water service entry? |
Not less than 200 kPa (29 psi) |
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What is the minimum size of a water service pipe |
3/4” |
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Which table in the National Plumbing Code of Canada 2020 is used for the simplified method of water system sizing? |
Table 2.6.3.4 |
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What is the maximum design velocity for cold and hot water distribution? |
2.4 m/s for cold water 1.5 m/s for hot water systems that do not exceed 60°C (140°F) |
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When using the simplified method, what is sized first? |
The hot water piping |
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What is the maximum pressure at the fixture in a water distribution system? |
550 kPag |
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What happens to the flow in a water system as the pressure gets higher? |
The flow gets noisier |
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For electric storage-type water heaters, thermostat controls shall be set at what temperature? |
60°C (140°F) |
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What shall be installed when any tank may be subject to back-siphonage? |
A vacuum-relief valve |
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What is the minimum size of a drain pan? |
50 mm larger than the tank and have side walls 25 mm high |
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