JOURNEYMAN PLUMBER CERTIFICATION
TEST BANK 2026 COMPREHENSIVE
QUESTIONS AND SOLUTIONS GRADED A+
● Minimum burial depth for water service piping in Florida. Answer: 12
inches.
● Minimum cover for sewer piping under driveways. Answer: 12 inches
(check local amendments).
● Minimum required pressure at the top floor of a building. Answer: 15
psi.
● Minimum pressure on water service at building entrance. Answer: 40
psi.
● When is a cleanout required on a horizontal drain line?. Answer:
Every 100 feet and at each change of direction greater than 45°.
● How often must horizontal drainage piping be supported?. Answer:
Every 4 feet for 2" and smaller; 10 feet for 3" and larger.
● Maximum distance between vent pipe supports. Answer: 10 feet.
, ● Minimum size vent through the roof. Answer: 3 inches.
● What is the developed length of a pipe run?. Answer: The total
centerline length, including all fittings.
● Can PVC be used for hot water distribution?. Answer: No, CPVC or
PEX must be used.
● Minimum slope for building sewers. Answer: 2% (1/4" per foot for
≤2½"; 1/8" per foot for ≥3").
● Maximum trap seal depth. Answer: 4 inches.
● Minimum trap seal depth. Answer: 2 inches.
● What type of joint is prohibited in concealed piping?. Answer:
Threaded cast-iron or galvanized joints.
● Minimum trap size for a shower. Answer: 2 inches.
● Minimum trap size for a floor drain. Answer: 2 inches.
TEST BANK 2026 COMPREHENSIVE
QUESTIONS AND SOLUTIONS GRADED A+
● Minimum burial depth for water service piping in Florida. Answer: 12
inches.
● Minimum cover for sewer piping under driveways. Answer: 12 inches
(check local amendments).
● Minimum required pressure at the top floor of a building. Answer: 15
psi.
● Minimum pressure on water service at building entrance. Answer: 40
psi.
● When is a cleanout required on a horizontal drain line?. Answer:
Every 100 feet and at each change of direction greater than 45°.
● How often must horizontal drainage piping be supported?. Answer:
Every 4 feet for 2" and smaller; 10 feet for 3" and larger.
● Maximum distance between vent pipe supports. Answer: 10 feet.
, ● Minimum size vent through the roof. Answer: 3 inches.
● What is the developed length of a pipe run?. Answer: The total
centerline length, including all fittings.
● Can PVC be used for hot water distribution?. Answer: No, CPVC or
PEX must be used.
● Minimum slope for building sewers. Answer: 2% (1/4" per foot for
≤2½"; 1/8" per foot for ≥3").
● Maximum trap seal depth. Answer: 4 inches.
● Minimum trap seal depth. Answer: 2 inches.
● What type of joint is prohibited in concealed piping?. Answer:
Threaded cast-iron or galvanized joints.
● Minimum trap size for a shower. Answer: 2 inches.
● Minimum trap size for a floor drain. Answer: 2 inches.
