DWV
Fixture Unit Value for tank type WC
4
Hours per classroom Tier
110
Developed length distance for hot water recirc. required
75ft
Minimum water service line
3/4 inch
An exterior drainage pipe for conveying storm water
Leader
A vent within two times the pipe diameter of a trap weir.
Crown Vent
Duration of a renewal cycle for Journeyman and Master Plumbers
Two Years
A connection between a pipe containing potable water and any non-potable water supply
Cross Connection
Demand Factor for One or Two Family Dwelling
0.5
Minimum trap arm distance for minimum diameter laundry.
4 Inches
Name of vent downstream from first fixture in a battery vent
Relief Vent
Minimum age requirement for apprenticeship in MA
16 years old
Minimum height for non-absorbent materials off floor for urinal.
48 Inches
Diameter supply for Flushometer Type WC
1 inch
Future vents shall be a minimum of two inch, be drip connected, and:
Labeled "Future Vent"
Maximum horizontal distance of sanitary vent terminal from opening.
Ten Feet
Minimum work hours experience for licensure in MA
6800 Hours
Minimum distance from side wall to center of lav in a public restroom
15 inches
Factor Value rating for Flushometer Type Urinal
6
3/4 inch black iron pipe for gas horizontal hanger spacing
8 Feet
VTRs on roofs used for gardening, a parking deck, observation deck, or similar purposes, the vent shall extend no less than _____ feet above the roof and be increased one pipe diameter.
8 Feet
Full length of one continuing education session
6 Hours
The lowest point inside a pipe upon which water can flow.
Invert
Vacuum relief valves shall be a minimum of one pipe size smaller than this:
The tank drain size
Specialized plumbing systems which are located within a property line, but not necessarily within a building.
Dedicated System