Vents
What is the minimum size wet vent?
2"
Is a permit required for replacing a wax ring on a water closet (Yes or No)?
Yes. Removal and re-installment of a fixture requires a permit.
A sanitary tee can be used in any position in a drainage system (True or False)?
False
What is the constant for a 45 degree offset?
1.41
According to 248 CMR, what temperature is considered hot water?
120 degrees Fahrenheit
What is the minimum size vent through a roof if there is only one vent?
3 inches
What are the four methods approved for testing a DWV system?
Peppermint, Water, Air, Smoke
Name two (2) scenarios when a Long Sweep fitting is required in a drainage system?
Changes of direction, specifically horizontal to horizontal and vertical to horizontal
What is the weight of one gallon of water?
8.33 Pounds
If the water pressure in a residential dwelling is over 80 PSI, what must be installed?
Pressure regulating valve
How many inches above the flood level rim will allow a vent to offset more than 45 degrees horizontally?
6 inches
What pressure is general water piping tested to?
125 PSI
What is the required pitch for a drain that is three (3) inches or less?
Quarter inch per foot
What is the formula for determining Gauge Pressure?
Height in Feet x 0.434
What is the boiling point of water in Fahrenheit?
212 degrees Fahrenheit
When common venting two fixtures at different levels, what is the maximum distance between each sanitary tee?
10 Inches
When testing a DWV system with AIR, what pressure is applied and for how long?
5 PSI for 15 minutes
What is the minimum size drain for a lavatory?
1.5 inches
What is the (Plumbing) formula for Gallon Capacity for pipes & tanks?
D2" x Length/Height" x .0034 or
D2" x Length/Height' x .0408 or
D2' x Length/Height' x 5.87
What is the maximum temperature that can be delivered at a kitchen faucet in a residential dwelling?
130 degrees Fahrenheit
What is required in the basement to allow fixtures to be added at a later time ?
Future Vent
At what height of water would a DWV system be required to be tested at?
10-foot head of water
Provide four (4) examples of a floor-mounted fixture?
Toilet, Shower, Tub, Floor Drain
How many gallons are in a cubic foot of water
7.5 Gallons
What is the maximum temperature that can enter a drainage system?
150 Degrees Fahrenheit