Tradesmen Flashcards
Is an elevation mark on a vacuum breaker setting the minimum elevation at the device that can be installed above the flood level rim of a fixture
Critical Level
Is an actual or potential tie between potable water and any source of pollution or contamination
Cross connection
A measurement of piping taken along the centerline of pipe and fittings
Developed length
Any pipe that conveys wastewater in the drainage system
Drain
The upper rim of a fixture where water will overflow
Flood level rim
Is a wastepipe that drains through an air gap to the drainage system
Indirect waste
A pipe installed to vent one fixture trap. It may connect to the vent system above the fixture or terminate in the open air.
Individual vent
Is the primary or principal pipe to which branches are connected
Main
Is the vertical distance between the opening of the water supply and the flood level rim of a receptacle
Air gap
Any part of the piping system except mains, stacks, and risers
Branch
A vent connecting individual vents with a stack or vent stack
Branch vent
Is the lowest part of the drainage system which receives waste from soil and waste pipes and connects to the building
Building drain
Is a drainage piping that conveys waste from the building drain to the public sewer or disposal system
Building sewer
Access opening in the drainage system used to remove obstructions
Clean out
Two or three compartment sink drained by a continuous waste connected to one trap
Combination fixtures
Is horizontal wet venting system for a sink and floor drains
Combination waste and venting system
This is water that is sufficiently free of impurities to meet public health standards
Potable water
Is a drainpipe conveying sewage containing fecal matter
Soil pipe
Is the extension of a soil or waste stack above the highest fixture served
Stack vent
Is a device that provides a water seal to prevent the passage of sewer gas and allow the passage of waste
Trap
Distance from the weir to the top of the dip of the trap
Trap seal
Is a backflow preventer that allows air to vacuum being pulled in a system
Vacuum breaker
A vertical vent pipe to provide circulation of air to and from the drainage system
Vent stack
Pipe that makes an angle of 45 degrees or more with the horizontal
Vertical pipe
Manufactures ________ must be on each _______ of pipe and each fitting, _____, fixtures, and device.
Identification, length, trap.
Pipes shall be ________ from breakage when passing under or through walls.
Protected
Copper must be supported horizontally- how many feet? On a small pipe?
6 feet or closer
Copper must be supported horizontally- how many feet? On 1 1/2” or larger?
10 feet
The drainage pipe shall be tested with a ___ ____ ____ or ___ at __ PSI
10 foot head of water or air at 5 PSI
Plumbing _______ must be made of approved, smooth, impervious material.
Fixtures
Water closets shall be set no closer than ____ inches center to center or ____ inches from a side wall.
30, 15
Water closets screws and bolts shall be _____
brass
Joints where fixtures contact walls and floors shall be sealed _____.
watertight
Overflows, if on a fixture must drain to the ______ (fixture) side of a trap.
inlet
Access must be provided to concealed ____-_____ connections.
slip-joint
Water closet tanks shall consume no more than _____ gallons per flush and have an ___-_____ ball cock with a refill tube to refill the _____ _____.
1.6, anti-siphon, trap seal
__-inch by __-inch water closet bend is acceptable.
4, 3
The shower must be at least ___ inches inside dimensions.
30
The water supply shall be a minimum of __ inch and have a pressure of no more than __ PSI.
3/4, 80
Water hammers caused by high velocity, quick-closing valves, air tanks, and pumps shall be controlled by ______ ________ ________.
water hammer arrestors
Copper water service pipe must be a minimum of type ___.
M
All pipes must be _______ to the full inside ________ of the pipe to prevent __________.
reamed, diameter, turbulence
Pipe joint compound shall be applied to _____ threads only.
male
Joints in PVC are made with solvent _______ and ______ primer.
cement, purple
The water supply shutoff valve must be installed on the ______ to each fixture.
supply
Cross connections must have ____ ______ or protective devices installed.
air gaps
Minimum / inch per fall on all _ / inches or smaller pipe.
1/4, 2 1/2
Hub and spigot joints in cast iron are made with ______ or _____ and lead (_______ ______).
oakum, hemp, caulked joint
Cast iron to plastic pipe joints shall be made by _______ or __________ compression joints.
caulked, mechanical
Drilled, tapped, or ______-type joints are ________.
saddle, prohibited
Cleanout plugs shall be made of _____ or _______.
brass, plastic
A clearance of no less than ____ inches must be provided for rodding on 6-inch cleanouts and smaller.
18
Water closets must use a maximum of ____ gal/flush
1.6
Change of direction from vertical to horizontal must be made by _____ ______ fitting.
long turn
Trap seals shall be protected from _____ ______ and _______ by vents and pressure the same as the outside air.
back pressure, siphonage
_______ shall be used to seal the _____ watertight where it passes through the _____.
Flashing, vent, roof
Vents shall terminate at least ___ feet horizontally or __ feet above all openable doors and windows.
10, 2
Vents shall be graded back to the drainage _____ at the fixture it serves.
pipe
Vents must rise vertically to _ inches above the flood level rim of the _____ fixture served before turning ____.
6, highest, hotizontal
Vents must be connected ______ the center line of the _______ pipe.
above, horizontal
Distance from _____ to _____ is set by charts (trap arms).
trap, vent
Trap arms cannot fall more than ___ pipe diameter (connect with san-tee, not wye or comb)
one
A fixture _____ shall connect above the weir of the fixture trap.
vent
_____ _____ are prohibited.
Crown Vents
Vents must not be installed within ___ pipes diameters of the trap weir.
2
A ____ vent is also a waste. (Only allowed on the _____ on the same floor).
wet, fixtures
The minimum size vent by the table is _ / inches. The size is determined by the fixture _____ being vented and developed length. The ____ the vent the longer it can be.
1 1/4, units, larger
Each fixture must be trapped with a ______ trap located as close as possible to the ______ outlet.
separate, fixture
The ______ distance cannot be over __ inches from the outlet of the fixture to the ____ weir.
vertical, 24, trap
No double _______. (No house trap)
trapping
Traps must be self-_____.
scouring
No crown-vented traps, ____ traps, drum traps, or _-traps.
bell, s
Trap seals _ inches to _ inch. Less will evaporate and a deeper seal causes too little _____.
2, 4, velocity
Traps that may ________ need a trap _____ to keep the seal full.
evaporate, primer
Air provided to replace exhausted air.
Air makeup
A change involving extension, addition, or change to the arrangement, type, or purpose of installation.
Alteration
Heat required to raise 1 pound of water at 1 degree F (British thermal units)
BTU
The minimum distance through air measured between a heated surface and a combustible material.
Clearance
Appliance that derives combustion air directly from the outside and discharges all flue gases to the outside.
Direct Vent Appliance
Low point in the system to collect condensate and allow for removal.
Drip leg
Natural, liquefied petroleum, manufactured gas or a mixture of these.
Fuel Gas
Burners, burner igniters, or electrical switches capable of igniting flammable vapor.
Ignition source
Propane propylene, butanes, or butylene’s or mixtures of these that are gas at normal pressure but liquid under moderate pressure.
LP Gas
A gas-tight joint obtained by mechanically tightening to metal surfaces, including flanged flared, thread compression joint.
Mechanical joint
A pipe or conduit for conveying combustion products and air to the atmosphere.
Vent
Test with _____ or inert gas, never oxygen.
Air
Before acceptance and operation, all piping shall be ________, and ________ tested.
inspected, pressure
All ______ shall be left exposed for testing.
joints
Test for not less than __ minutes at _ / times the maximum working pressure but not less than 3 P.
10, 1 1/2
There shall be a shut off valve no further than _ feet from each appliance and shall be readily _________ in the same room.
6, accessible
If the system serves more than one building, a ______ shall be installed outside of each building.
shutoff
Minimum support spacing for 1/2 inch pipe?
6 feet
Minimum support spacing 3/4” or 1” pipe
8 feet
Minimum support spacing for 1 1/4” or larger horizontal?
10 feet
Minimum support spacing for 1 1/4” or larger vertical?
Every floor level
Vents must rise a minimum of _ feet vertically and _ feet above any part of the building within _ feet.
5, 2, 10
Vents must terminate with an approved ___ that is installed to meet manufacturers instructions.
cap
Temperature and pressure relief valves are installed to ______ excessive temperature and pressure to prevent an explosion.
prevent
Temperature and pressure relief valves must be within the top _ inches of the tank.
6
_____ valves are required on all water heaters (gas and electric)
Relief
Maximum temperature of _____ (on the valve)
210
T & P discharge piping must be _____ for hot water with _____ or _____ piping?
Rated, copper, cpvc
T&P discharge piping must terminate _” above grade.
6
Must fall to the ______ of the building. (Not a pan)
outside
Not trapped (down hill)
T & P discharge piping
T & P discharge piping must be full size?
3/4”
