Valves
what size of a plug valve requires an actuator
Over 4"
what code clause in the code book does it state where a vacuum relief valve must be installed on a storage type water heater
2.6.1.7.(8)
3 materials used to manufacture jet tubs?
Acrylic, Cast Iron, Fiberglass
urinals shall not be installed adjacent to walls and floors that are?
pervious to water
2.4.3.1.(1)
The trap arm of water closets, of s-trap standards or of any other fixture that also depends of siphonic action for its proper functioning shall not have a cumulative change in direction of more than?
225 degrees
on chain operated valves the chain should extend to what length from the floor
3 feet or one meter
what is required on both hot and cold waterlines for a hot water heater?
Both lines hot and cold are required to be insulated 2m out from the tank.
Bath tubs which are available for installation in bathroom floor openings are called sunken tubs or?
Roman tubs
after how many FU must a branch drain be increased to 3"?
6 FU
Vent pipes shall be installed without _____ in which moisture can collect
Depressions
npcc 2.5.6.1
Name the 7 Components of a gate valve
Handle, Packing nut, Packing gland, Stem, Union bonnet ring, body, disc
a home with 4 bedrooms, a washing machine, and dishwasher requires what size of electric hot water tank.(us gallons)
72 US gallons
shower receptors shall be constructed and arranged so that?
Water cannot leak through the walls and floor
what does ABS stand for?
Acrylonitrile Butadiene Styrene
which vent uses table 2.5.7.1.
minimum 1 size smaller then the largest inlet pipe and not larger than 4"
sewage sump vent
to allow lubrication to be applied to the center of the packing material in larger valves what is built into stuffing box
a lantern ring
what size do commercial hot water tanks generally range from(in imperial gallons)
50-62 imperial gallons
up to how many jets can a 6' air tub have?
80 jets
a Clean out shall be provided to permit the cleaning of the piping _____ of an interceptor?
downstream
How many fixture units are permitted on a 5" wet vent serving a water closet
18 FU
regular globe valves shall not be used to reduce pressure cross the valve more than _____ of the inlet pressure for prolonged periods of time
20%
in order to guard against the development of excessive pressure inside a hot water storage tank owing to thermal expansion of the water, it is customary to install a spring loaded pressure relief valve that is set to open at what pressure?
20 lbs
Flood level rim for a garbuerator
36 inches above the finished floor(Same as kitchen sink)
According to npcc what is the hydraulic load from a fixture that produces a continuos flow such as a pump or air conditioning fixture for each litre per second of flow
31.7
N.P.C.C. 2.4.10.3.(1)
why is crown venting prohibited under the npcc
the vent connection near the trap weir can promote siphonage instead of protecting the trap weir