JOURNEYMAN PLUMBING EVALUATION EXAM 2025/2026
QUESTIONS AND ANSWERS GRADED A++
✔✔Wet Vent - ✔✔A vent which also serves as a drain
✔✔invert - ✔✔The lowest point of the inside of a drain, pipe, channel, or other liquid-
carrying conduit.
✔✔Trap Primer - ✔✔A device and system of piping that maintains a water seal in a
remote trap.
✔✔Static Pressure - ✔✔the pressure existing without any flow motion.
✔✔Main Vent (Vent Stack) - ✔✔principal artery of the venting system
✔✔BRAZED JOINT - ✔✔any joint obtained by joining of metal parts with alloys which
melt at temperatures higher than 840F, but lower than the melting temperature of the
parts to be joined.
✔✔soldered joint - ✔✔any pipe joint obtained by joining metal parts with metallic
mixtures or
alloys which melt at a temperature below 800F and above 300F
✔✔BUILDING SUBDRAIN - ✔✔that portion of an underground system, which cannot
drain by
gravity into the building sewer
✔✔Rain Leader - ✔✔Pipe used to carry rainwater from the roof to the ground and away
from the building. Rain leaders can be enclosed within the building thermal envelope
and daylight only when discharging from the building or can be surface-mounted on the
exterior of the building.
✔✔Water Hammer Arrestor - ✔✔a device that absorbs the hydraulic shock caused by
the sudden stopping of water flow, usually installed near clothes washing machine and
dishwasher water supply connections.
✔✔Backwater valve - ✔✔a device installed in a drainage system to prevent reverse flow
.
✔✔Backflow Preventer - ✔✔A check valve that prevents water from flowing back into a
system and contaminating it.
✔✔water heater - ✔✔Any heating appliance or equipment that heats potable water and
supplies such water to the potable hot water distribution system.
,✔✔Direct vent appliance - ✔✔Appliances that are constructed and installed so that all
air for combustion is derived directly from the outdoors and all flue gases are
discharged to the outside atmosphere
✔✔SCFM - ✔✔standard cubic feet per minute
✔✔T Rating (IBC Ch. 2) - ✔✔time period that the penetration firestop limits maximum
temperature 325 degrees
✔✔gray water - ✔✔all of the wastewater that drains from washing machines, sinks,
dishwashers, tubs or showers and can be reused for non-sanitary purposes
✔✔air break - ✔✔a physical SEPARATION between a waste pipe and an indirect waste
receptor.
✔✔air gap - ✔✔an air space that separates a water supply outlet from a potentially
contaminated source
✔✔ADA - ✔✔Americans with Disabilities Act
✔✔Water closets, urinals, & Bidets set side by side shall be no closer than - ✔✔30"
center to center
✔✔minimum distance from a side wall to the center of a urinal - ✔✔12"
✔✔Tailpiece - ✔✔pipe or tubing that connects the outlet of a plumbing fixture to a trap
✔✔minimum tailpiece for lavatory - ✔✔1 1/4"
✔✔Water closet/bidet clear space in front - ✔✔24"
✔✔maximum bidet temp - ✔✔110
✔✔First Hour Rating - ✔✔water heater size chart
✔✔Water heaters installed in residential garages shall be installed so that all burners
and burner-ignition devices are located not less than 18 inches above the floor unless -
✔✔it is listed as flammable vapor ignition resistant
✔✔a passageway for a water heater in an attic must be - ✔✔24" wide
✔✔water heater attic access must be - ✔✔floored
, ✔✔in a gang shower, the maximum water temp discharging from any single head is
A) 105
B)115
C)109
D)120 - ✔✔120
✔✔A clothes washer trap must not be installed: - ✔✔below the floor, with a trap less
than 6" or more than 18" from the floor
✔✔A bar sink may be installed without a vent but must - ✔✔drain through an airgap
✔✔A standpipe for a clotheswasher must be - ✔✔between 18" and 30"
✔✔When can CPVC not be used for water - ✔✔in freezing temp climates, outside of
building, below ground
✔✔a 3 compartment bar sink connected with one trap must be a max distance: - ✔✔30"
center to center
✔✔water supplying a urinal must be protected by - ✔✔vaccum breaker/ backflow
preventer
✔✔Traps must be self - ✔✔scouring/ cleaning
✔✔backflow vs back water protection - ✔✔backflow is for water, backwater is for drains
✔✔minimum water service pipe size - ✔✔3/4
✔✔A shower drain outlet shall not be smaller than - ✔✔2"
✔✔minimum trap seal - ✔✔2"
✔✔discharge from water heater relief valve into its own pan is - ✔✔Prohibited
✔✔foot vent slope - ✔✔1/4" upward
✔✔minimum size loop vent for kitchen sink - ✔✔1 1/4
✔✔minimum size loop vent for kitchen sink - ✔✔1 1/4
✔✔2" vent serves - ✔✔24 fixture units
✔✔Lavatory fixture unit - ✔✔1 DFU
QUESTIONS AND ANSWERS GRADED A++
✔✔Wet Vent - ✔✔A vent which also serves as a drain
✔✔invert - ✔✔The lowest point of the inside of a drain, pipe, channel, or other liquid-
carrying conduit.
✔✔Trap Primer - ✔✔A device and system of piping that maintains a water seal in a
remote trap.
✔✔Static Pressure - ✔✔the pressure existing without any flow motion.
✔✔Main Vent (Vent Stack) - ✔✔principal artery of the venting system
✔✔BRAZED JOINT - ✔✔any joint obtained by joining of metal parts with alloys which
melt at temperatures higher than 840F, but lower than the melting temperature of the
parts to be joined.
✔✔soldered joint - ✔✔any pipe joint obtained by joining metal parts with metallic
mixtures or
alloys which melt at a temperature below 800F and above 300F
✔✔BUILDING SUBDRAIN - ✔✔that portion of an underground system, which cannot
drain by
gravity into the building sewer
✔✔Rain Leader - ✔✔Pipe used to carry rainwater from the roof to the ground and away
from the building. Rain leaders can be enclosed within the building thermal envelope
and daylight only when discharging from the building or can be surface-mounted on the
exterior of the building.
✔✔Water Hammer Arrestor - ✔✔a device that absorbs the hydraulic shock caused by
the sudden stopping of water flow, usually installed near clothes washing machine and
dishwasher water supply connections.
✔✔Backwater valve - ✔✔a device installed in a drainage system to prevent reverse flow
.
✔✔Backflow Preventer - ✔✔A check valve that prevents water from flowing back into a
system and contaminating it.
✔✔water heater - ✔✔Any heating appliance or equipment that heats potable water and
supplies such water to the potable hot water distribution system.
,✔✔Direct vent appliance - ✔✔Appliances that are constructed and installed so that all
air for combustion is derived directly from the outdoors and all flue gases are
discharged to the outside atmosphere
✔✔SCFM - ✔✔standard cubic feet per minute
✔✔T Rating (IBC Ch. 2) - ✔✔time period that the penetration firestop limits maximum
temperature 325 degrees
✔✔gray water - ✔✔all of the wastewater that drains from washing machines, sinks,
dishwashers, tubs or showers and can be reused for non-sanitary purposes
✔✔air break - ✔✔a physical SEPARATION between a waste pipe and an indirect waste
receptor.
✔✔air gap - ✔✔an air space that separates a water supply outlet from a potentially
contaminated source
✔✔ADA - ✔✔Americans with Disabilities Act
✔✔Water closets, urinals, & Bidets set side by side shall be no closer than - ✔✔30"
center to center
✔✔minimum distance from a side wall to the center of a urinal - ✔✔12"
✔✔Tailpiece - ✔✔pipe or tubing that connects the outlet of a plumbing fixture to a trap
✔✔minimum tailpiece for lavatory - ✔✔1 1/4"
✔✔Water closet/bidet clear space in front - ✔✔24"
✔✔maximum bidet temp - ✔✔110
✔✔First Hour Rating - ✔✔water heater size chart
✔✔Water heaters installed in residential garages shall be installed so that all burners
and burner-ignition devices are located not less than 18 inches above the floor unless -
✔✔it is listed as flammable vapor ignition resistant
✔✔a passageway for a water heater in an attic must be - ✔✔24" wide
✔✔water heater attic access must be - ✔✔floored
, ✔✔in a gang shower, the maximum water temp discharging from any single head is
A) 105
B)115
C)109
D)120 - ✔✔120
✔✔A clothes washer trap must not be installed: - ✔✔below the floor, with a trap less
than 6" or more than 18" from the floor
✔✔A bar sink may be installed without a vent but must - ✔✔drain through an airgap
✔✔A standpipe for a clotheswasher must be - ✔✔between 18" and 30"
✔✔When can CPVC not be used for water - ✔✔in freezing temp climates, outside of
building, below ground
✔✔a 3 compartment bar sink connected with one trap must be a max distance: - ✔✔30"
center to center
✔✔water supplying a urinal must be protected by - ✔✔vaccum breaker/ backflow
preventer
✔✔Traps must be self - ✔✔scouring/ cleaning
✔✔backflow vs back water protection - ✔✔backflow is for water, backwater is for drains
✔✔minimum water service pipe size - ✔✔3/4
✔✔A shower drain outlet shall not be smaller than - ✔✔2"
✔✔minimum trap seal - ✔✔2"
✔✔discharge from water heater relief valve into its own pan is - ✔✔Prohibited
✔✔foot vent slope - ✔✔1/4" upward
✔✔minimum size loop vent for kitchen sink - ✔✔1 1/4
✔✔minimum size loop vent for kitchen sink - ✔✔1 1/4
✔✔2" vent serves - ✔✔24 fixture units
✔✔Lavatory fixture unit - ✔✔1 DFU
