DC2 Plumbing Flashcards
What should always be replaced when removing and installing a toilet to provide a seal between the flange and the toilet?
Wax ring
The vent for a toilet must be a minimum of how many inches in diameter?
Two
Prior to installing the hangers for a wall urinal, what do you need to check?
The wall for adequate framing support
What is the size of a urinal supply line?
3/4”
What does the sinks waste disposal drain into?
Building waste system
What should be applied to the underside lip of the sink just prior to setting the sink into the hole?
Silicone caulk
The hidden drain components on a shower and tub combination are mostly made of?
Rough brass and PVC
How are shower valves attached to supply piping?
Soldered
What part of the garbage disposal is installed first?
Disposals sink flange and mounting assembly
When there is a garbage disposal installed in a sink, where does the drain from a dishwasher connect?
Into the side of the garbage disposal
What device relieves excess pressure from a water heater?
Pressure temperature relief valve
Installation of a gas water heater requires a flue or chimney to carry what out of the house?
by products of combustion
List three safety devices that are in both gas and electric water heaters
Thermostat
Safety cutoff thermostat
temperature pressure relief valve
When is safe to disconnect electrical cables from an old water heater to remove it?
When the wires are dead
Once power has been secured, what will be done before removing an old water heater for replacement?
Water is drained from tank
Every gas water heater needs proper venting that is no smaller than the _____ of the new heater
new draft hood collar
A standard rough opening for a dishwasher must have a minimum height of approximately ____ inches from the floor to the underside of the countertop
34 1/2 inches
List the three hookup/connections required to install a dishwasher
Hot water supply
drain
electrical
How should the ice maker wire harness be plugged into the connector on the back wall of the freezer?
using a rocking motion until locking fingers snap into place
When connecting the water supply to an ice maker, you should create a service loop with ____ foot tubing
8ft
The waste drain on a toilet must be a minimum of ___ inches in diameter?
3inches
To determine the rough in dimensions of a toilet, you must measure from the center point between the ____ to the finished wall
bolt holes
The supply tubing for a urinal flushometer requires a ___ inch male adapter
3/4in
The stop valve on a flushometer contains a _____ which is sometimes covered by a chrome cap
water flow adjusting screw
When installing new sink components into a sink, what is the best postion to have the sink?
upside down on padded counter
what type of material should you place under the lip of a sink strainer prior to pushing it through the drain hole?
plumbers putty
What is the most important requirement when installing a shower?
Waterproofing floor and walls
solder shower valves are secured to the backing boards in the wall with ______ straps?
Copper
During installation, you should apply plumbers putty to what part of the garbage disposal?
rim of disposers flange
Garbage disposals have a fitting on the side that allows a _____ to be connected?
Dishwasher drain line
What type of sealant should you use on the connection threads on a gas water heater to ensure a good seal?
Stick pipe dope
what safety device is used on both gas and electric water heaters to prevent excess temperature or pressure from building up in the tank?
Temp/press relief valve
Dishwasher drain hose generally must not exceed what length for proper drainage?
10’
A dishwasher must be connected to a waste line with an air gap or a ___ inch high loop drain
32 inch
Water pressure to a water pressure valve of an ice maker with a filter must have a minimum pressure of ?
25 psi
Shows the location of the proposed structure and where the water and gas lines should enter the proposed building?
Foundation plan
Sanitary sewer that is below ground must be made of what material?
Extra heavy cast iron piping and fittings of the bell and spigot type
Sanitary sewer that is ABOVE ground must be made of
zinc coated, standard weight screwed end steel pipe and cast iron
sewer vents will extend how many inches above the roof?
12 inches
All male screw ends on a sewer line must be wrapped with?
good grade pipe joint compound
bathtub traps must be provided with a ____ inch brass screw drain plug and be supported from the floor joist with hangers
3/4 inch drain plug
Which plan shows you the location of interior walls and fixtures?
Floor plans
Which plan shows you the location of existing wastewater and gas piping systems?
Plot plan
Which type of line does water enter the structure from the main distribution line?
Cold water service line
Blueprints are copies of what type of drawings?
Mechanical
Which of the following mil standards specifies the size, format, location and type of information to be included in military blueprints?
Mil-std-100A
Which of the following construction lines is a light and continuos along which the tracing is trimmed?
Trim line
Which type of line is drawn outside the structure or detail to show distance?
Dimension line
Which line is used in conjunction with the dimension line? it extends out from the edge or the point at which the dimension is to be determined
Extension line
unions are used in which type of piping system?
Black iron
seven methods of measuring pipe or tubing?
end to end center to center end to center end to back Center to back back to back face to face
Minimum pipe size for a toilet with flushometer is ?
1inch
Urinal with flushometer inlet size?
3/4 inch
Minimum inlet size for a shower bath is?
1/2 inch
inlet size for a scullery sink?
3/4 inch
Minimum inlet size for a domestic water heater?
3/4 inch
Pex plumbing comes in 3/8 inch up to and over ___ inches
2 inches
Flow rate of bathtub?
4 gpm at 20psi
flow rate of lavatory sink?
2 gpm at 8 psi
Flow rate of urinal ?
12 gpm at 25 psi
Lavatory minimum supply size?
1/2 inch
What are the four types of urinals?
Wall hung
Pedestal
trough
stall
Tank type water closet minimum supply size?
1/2 inch
Hot and cold water supply lines for a bathtub/shower must be of what size and spaced how far apart?
1/2 inch diameter spaced 8 inches apart
What are the four methods to joining pvc?
Solvent welding
Fusion welding
Fillet welding
threading
What type of fitting allows workers access to the piping system to remove blockage?
Cleanout
What fitting is usually installed at the piping connection between the plumbing fixture and the waste system piping?
Traps
Deep p-traps have a ___ inch water seal while a ordinary p-trap has a 2 inch trap
4 inch
This type of seal loss in a trap starts when water in a fixture exits the fixture abruptly.
Direct siphonage
This type of seal loss in a trap is caused by a foreign object lodged in the trap
Capillary action
A pipe that allows air into a waste piping system to protect trap seals and allow sewer gases to escape
Vent pipe
What is the maximum distance that a fixture supply pipe can terminate from the point of connection to the fixture?
30 inches
This tee is used mostly in venting systems
Tapped tees
During prolonged storage, pvc piping should not be stacked more that how many feet high?
2 feet high
