Plumbing Flashcards
What are the different types of plumbing pipe, from thickest to thinnest?
Type K
Type L
Type M
What is the most common pipe type for supply water?
Type L
What is the most common pipe type for condensate lines?
Type M
What is Type DWV used for?
Drain & vents
What is a blue roof?
A roof where water ponds on the roof by choking the drain system so as to not overwhelm the sewer system
What are the pros of using copper piping?
It has more friction
What are the cons of using copper piping?
It costs more
What are the pros of using plastic piping?
It is cheaper
What are the cons of using plastic piping?
It has less friction
What are the 3 main types of valves?
Gate, globe and check
Where would you see a vacuum breaker in plumbing?
Backflow preventer
When is a gate valve used?
Maintenance as it provides no resistance to the system
When is a globe valve used?
Typ faucet valve and adds resistance, but at end of plumbing line
When is a check valve used?
Backflow preventer
Where is a check valve often used?
At the entry to building to ensure if negative pressure is present, there isn’t waste water contaminating the municipal supply
What is the formula for determining water pressure?
P = 0.433 x H
Where P = Pressure in psi
0.433 is a unit conversion constant
& H = height from water supply to fixture
What is the minimum pressure for fixtures?
4 PSI to 20 PSI
What is the typical water main pressure?
50 PSI to 75 PSI
What is Blackwater?
Water that has human and food waste
What is Greywater?
Waste water that has not been in contact with human or food waste
Where might you see an expansion loop?
Hot water piping
How do we size pipes?
Pressure and flow
What is the water temperature for kitchen and laundry supply?
140F
What is the water temperature for a shower?
110F
What is the water temperature for handwashing?
105F
What unit type should we use to determine there is enough pressure and flow being provided?
Fixture Units - NOT GPM
What do traps do?
Provide a water barrier to prevent vent gas coming out of the fixture
Where can laundry waste water be used?
Irrigation
Where can bathing waste water be used?
After treatment, in the toilet
What is a ‘soil stack’?
Human waste vent line from toilet
What is a ‘waste stack’
Grey water vent line
What is a ‘vent stack’
Vent line that runs parallel to the drainage stack to prevent waste water from higher floors going into the vent line
What is a ‘perc test’?
Test to see how long it takes for water to be absorbed
What is considered a shallow well?
A well less than 25’ deep
What are the 4 types of plastic pipes?
ABS
PE
PVC
PVDC
What is the difference between a 1-pipe and 2-pipe system?
2 pipe system adds a return line so that water delivered at the end is the same temp that is delivered first
How do you prevent water hammering?
Surge Arrestors
What are the 3 reasons to use plumbing insulation?
To keep heat in
To keep coolth in
To prevent condensation
