RHODE ISLAND JOURNEYMAN
PLUMBER REVIEW SHEET 2026 FULL
QUESTIONS AND ACCURATE
ANSWERS
◉ What is the minimum depth for water services to be installed?
Answer: 4' 6" Below Grade
◉ What must piping installed in exterior walls or areas subject to
freezing be? Answer: Insulated/Heated or Both
◉ What is the minimum coverage for building sewers connected to a
public sewer? Answer: 36" Below Grade
◉ What should be installed under a water heater 6 gallons or greater that
is elevated? Answer: A safe waste pan
◉ What is the minimum depth for a safe waste pan? Answer: 2" deep
with 2" clearance around heater
◉ What is the required separation distance for water service piping and
building drain/sewer? Answer: 10' undisturbed compacted earth
◉ What is the minimum distance for a septic tank/sewer to a private
water supply (well)? Answer: 50'
,◉ What is the vent size increase requirement where frost closure is
common? Answer: 6" below the roof with an approved fitting
◉ What is the high hazard flood zone designation? Answer: "V" zone
(subject to wave heights in excess of 3')
◉ What is the maximum lead content in lead-free pipe and fittings?
Answer: 8.0% Lead
◉ What is the maximum lead content in lead-free solder and flux?
Answer: 0.2% Lead
◉ What is the minimum size for strainer plates on drain lines for rodent
proofing? Answer: 0.5 inches
◉ What is the minimum size for floor drains in public laundries or
central washing facilities? Answer: 3"
◉ What is the minimum size for shower waste outlets? Answer: 1 1/2"
◉ What is the minimum size for removable strainer for shower
compartments? Answer: 3"
◉ Minimum size floor drain strainer opening is: Answer: .25"
, ◉ What is the minimum weight for sheet lead? Answer: 4 pounds per
square foot
◉ What is the minimum weight for sheet copper? Answer: 12 ounces
per square foot
◉ What is the maximum percentage of urinals that can be substituted for
water closets? Answer: 67%
◉ What is the maximum hot water setting for shower and tub/shower
valves? Answer: 120 degrees
◉ What is the maximum water temperature for a tankless heater or
domestic hot water heater? Answer: 140 degrees
◉ What is the maximum setting for a temperature pressure and relief
valve? Answer: 210 degrees 150 psi
◉ What is the minimum working pressure for domestic water service
either outside or buried? Answer: 160 psi
◉ What is the minimum pressure rating for hot water distribution
piping? Answer: 100 psi @180 degrees
PLUMBER REVIEW SHEET 2026 FULL
QUESTIONS AND ACCURATE
ANSWERS
◉ What is the minimum depth for water services to be installed?
Answer: 4' 6" Below Grade
◉ What must piping installed in exterior walls or areas subject to
freezing be? Answer: Insulated/Heated or Both
◉ What is the minimum coverage for building sewers connected to a
public sewer? Answer: 36" Below Grade
◉ What should be installed under a water heater 6 gallons or greater that
is elevated? Answer: A safe waste pan
◉ What is the minimum depth for a safe waste pan? Answer: 2" deep
with 2" clearance around heater
◉ What is the required separation distance for water service piping and
building drain/sewer? Answer: 10' undisturbed compacted earth
◉ What is the minimum distance for a septic tank/sewer to a private
water supply (well)? Answer: 50'
,◉ What is the vent size increase requirement where frost closure is
common? Answer: 6" below the roof with an approved fitting
◉ What is the high hazard flood zone designation? Answer: "V" zone
(subject to wave heights in excess of 3')
◉ What is the maximum lead content in lead-free pipe and fittings?
Answer: 8.0% Lead
◉ What is the maximum lead content in lead-free solder and flux?
Answer: 0.2% Lead
◉ What is the minimum size for strainer plates on drain lines for rodent
proofing? Answer: 0.5 inches
◉ What is the minimum size for floor drains in public laundries or
central washing facilities? Answer: 3"
◉ What is the minimum size for shower waste outlets? Answer: 1 1/2"
◉ What is the minimum size for removable strainer for shower
compartments? Answer: 3"
◉ Minimum size floor drain strainer opening is: Answer: .25"
, ◉ What is the minimum weight for sheet lead? Answer: 4 pounds per
square foot
◉ What is the minimum weight for sheet copper? Answer: 12 ounces
per square foot
◉ What is the maximum percentage of urinals that can be substituted for
water closets? Answer: 67%
◉ What is the maximum hot water setting for shower and tub/shower
valves? Answer: 120 degrees
◉ What is the maximum water temperature for a tankless heater or
domestic hot water heater? Answer: 140 degrees
◉ What is the maximum setting for a temperature pressure and relief
valve? Answer: 210 degrees 150 psi
◉ What is the minimum working pressure for domestic water service
either outside or buried? Answer: 160 psi
◉ What is the minimum pressure rating for hot water distribution
piping? Answer: 100 psi @180 degrees
