RHODE ISLAND JOURNEYMAN PLUMBER
EXAM 2026 COMPLETE QUESTIONS AND
SOLUTIONS GRADED A+
⫸ What is the line in the building that carries water from the roof to the
sewer called? Answer: Conductor
⫸ What is the minimum size outlet for a shower in RI? Answer: 1 1/2"
⫸ What is the minimum and maximum length length of a waste stack to
a trap weir? Answer: 18" & 42"
⫸ What must be installed before connecting an irrigation system to a
potable water supply? Answer: A pressure reducing backflow preventer
⫸ Can Combustible liquids that condense be allowed down the public
sewer? Answer: Always follow the manufactures instructions
⫸ How should a grease trap be sized when hooking it up to a
commercial food waste grinder? Answer: It should be sized to the outlet
of the food waste grinder
⫸ Water pipe should be buried how many feet under ground? Answer: 4
1/2 ft
, ⫸ A vent which extrudes out the side of the building should be at least
how many feet away from doors and windows? Answer: 10' and 2'
⫸ In RI, hot water is? Answer: 110 degrees
⫸ There should be a clearance of how many inches in front of a water
closet? Answer: 21"
⫸ A vent size should be determined by it's? Answer: Length
⫸ A vent from a bed pan washer is __________ from being connected
to a local vent? Answer: Prohibited
⫸ True or False: A backwater valve can be buried Answer: False
⫸ A water hammer arrestor should be used when? Answer: In the
vicinity of quick closing valves
⫸ The slip joints on a tub waste should be_________ during a test?
Answer: Accessible
⫸ Copper tubing 1 1/4" in diameter and above should be supported
every? Answer: 5 ft
EXAM 2026 COMPLETE QUESTIONS AND
SOLUTIONS GRADED A+
⫸ What is the line in the building that carries water from the roof to the
sewer called? Answer: Conductor
⫸ What is the minimum size outlet for a shower in RI? Answer: 1 1/2"
⫸ What is the minimum and maximum length length of a waste stack to
a trap weir? Answer: 18" & 42"
⫸ What must be installed before connecting an irrigation system to a
potable water supply? Answer: A pressure reducing backflow preventer
⫸ Can Combustible liquids that condense be allowed down the public
sewer? Answer: Always follow the manufactures instructions
⫸ How should a grease trap be sized when hooking it up to a
commercial food waste grinder? Answer: It should be sized to the outlet
of the food waste grinder
⫸ Water pipe should be buried how many feet under ground? Answer: 4
1/2 ft
, ⫸ A vent which extrudes out the side of the building should be at least
how many feet away from doors and windows? Answer: 10' and 2'
⫸ In RI, hot water is? Answer: 110 degrees
⫸ There should be a clearance of how many inches in front of a water
closet? Answer: 21"
⫸ A vent size should be determined by it's? Answer: Length
⫸ A vent from a bed pan washer is __________ from being connected
to a local vent? Answer: Prohibited
⫸ True or False: A backwater valve can be buried Answer: False
⫸ A water hammer arrestor should be used when? Answer: In the
vicinity of quick closing valves
⫸ The slip joints on a tub waste should be_________ during a test?
Answer: Accessible
⫸ Copper tubing 1 1/4" in diameter and above should be supported
every? Answer: 5 ft
