JOURNEYMAN PLUMBER CERTIFICATION
FINAL PAPER 2026 SOLVED QUESTIONS
AND ACCURATE ANSWERS GRADED A+
● A stack as defined in the code is _____. Answer: the vertical main of a
soil, waste or vent piping which extends one or more stories
● A device to prevent backflow into potable water system is called a
_____. Answer: backflow connection/backflow preventer
● Copper tube and fittings used for drainage and vent piping installed
above ground shall be at least _____. Answer: copper DWV tube
● Horizontal drainage lines connecting with horizontal drainage lines
shall enter through _____. Answer: 45 degree wye branches
● The vertical distance between a fixture outlet and the trap weir shall
not exceed _____. Answer: 24 inches
● Concealed slip joint connections require a _____. Answer: 12x12
access panel
, ● The critical level of a urinal flushometer vacuum breaker to the
highest part of the fixture is _____. Answer: 6 inches
● Water closet tank ballcocks shall be installed with the vacuum breaker
critical level at least _____. Answer: 1 inch above the full opening of the
overflow tube
● The maximum distance of a gas shutoff valve from a gas appliance
(except for range and dryer connections) is _____. Answer: 6 feet
● The minimum size of any piping outlet for a free standing gas range
shall be _____. Answer: 3/4 of an inch
● A plumbing permit expires if work authorized by the permit is not
started within _____. Answer: 180 days
● A fixture trap is vented to _____. Answer: prevent the loss of trap
seal, reduce noise in the drainage system & prevent siphonage or
backpressure to a trap
● Standpipe receptors for clothes washers shall extend above the trap no
less than ______. Answer: 18 inches
FINAL PAPER 2026 SOLVED QUESTIONS
AND ACCURATE ANSWERS GRADED A+
● A stack as defined in the code is _____. Answer: the vertical main of a
soil, waste or vent piping which extends one or more stories
● A device to prevent backflow into potable water system is called a
_____. Answer: backflow connection/backflow preventer
● Copper tube and fittings used for drainage and vent piping installed
above ground shall be at least _____. Answer: copper DWV tube
● Horizontal drainage lines connecting with horizontal drainage lines
shall enter through _____. Answer: 45 degree wye branches
● The vertical distance between a fixture outlet and the trap weir shall
not exceed _____. Answer: 24 inches
● Concealed slip joint connections require a _____. Answer: 12x12
access panel
, ● The critical level of a urinal flushometer vacuum breaker to the
highest part of the fixture is _____. Answer: 6 inches
● Water closet tank ballcocks shall be installed with the vacuum breaker
critical level at least _____. Answer: 1 inch above the full opening of the
overflow tube
● The maximum distance of a gas shutoff valve from a gas appliance
(except for range and dryer connections) is _____. Answer: 6 feet
● The minimum size of any piping outlet for a free standing gas range
shall be _____. Answer: 3/4 of an inch
● A plumbing permit expires if work authorized by the permit is not
started within _____. Answer: 180 days
● A fixture trap is vented to _____. Answer: prevent the loss of trap
seal, reduce noise in the drainage system & prevent siphonage or
backpressure to a trap
● Standpipe receptors for clothes washers shall extend above the trap no
less than ______. Answer: 18 inches
