1
Journeyman Plumbing Test Study Guide
2025/2026 Exam Questions and Correct
Answers | New Update
more restrictive provisions apply - 🧠 ANSWER ✔✔where conflicts occur between
code and manufacture instructions.
what shall be 3rd party certified as conforming to NSF 14 - 🧠 ANSWER ✔✔all
plastic pipe, fittings and components.
all strainer plates on drain inlets shall be designed and installed so that all openings
are..? - 🧠 ANSWER ✔✔not greater than 1/2 inch (12.7) in least dimension.
pipes through foundation walls need..? - 🧠 ANSWER ✔✔a relieving arch or a pipe
sleeve which is 2 pipe sized bigger.
waterproofing joints at the roof and around vent pipes shall be made water tight by
use of....? - 🧠 ANSWER ✔✔lead, copper, steel, aluminum, plastic, or approved
flashing/flashing material.
exterior wall opening must be made...? - 🧠 ANSWER ✔✔water tight.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
,2
T or F: buried piping needs to be supported throughout it entire length. - 🧠
ANSWER ✔✔True
When backfilling the trench, that was over excavated - 🧠 ANSWER ✔✔backfill up
to installation level of bottom of pipe w/sand or gravel in layers no more than 6" in
depth and compacted after each placement.
when a rock is encountered trenching - 🧠 ANSWER ✔✔removed to not less than 3
inches below installation level. backfill with tamped sand.
when backfilling pipe systems crown of the pipe must be covered by...? - 🧠
ANSWER ✔✔12 inches of tamped earth.
T or F: truss members and components may be cut, drilled, notched or spliced. - 🧠
ANSWER ✔✔false. unless they obtain approval from a design professional.
hanger spacing: steel pipe - 🧠 ANSWER ✔✔every 12 ft horizontal 15 vertical
where hot water piping is bundled w/cold or hot water piping... - 🧠 ANSWER
✔✔each hot water pipe shall be insulated.
pipe sizes great than 4 inch need restraints for drain pipes at.. - 🧠 ANSWER ✔✔all
changes in direction and changes in diameter greater that 2 pipe sizes.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
,3
testing gauge required for 10 psi or less? - 🧠 ANSWER ✔✔has increments of
.10psi or less.
testing gauge required for >10 psi up to 100 psi - 🧠 ANSWER ✔✔increments of 1
psi
testing gauge required for greater than 100 psi - 🧠 ANSWER ✔✔increments of 2
psi
tests shall last not less than..? - 🧠 ANSWER ✔✔15 minutes
2 ways you can test a drainage system. - 🧠 ANSWER ✔✔in its entirety or in
sections.
if testing entire drainage system, all openings in piping shall be tightly closed
except..? - 🧠 ANSWER ✔✔the highest opening, and system shall be filled to point
of overflowing.
if drainage system is tested in sections, no section shall be tested with less than..? -
🧠 ANSWER ✔✔a 10 foot head of water.
T or F: plastic piping shall not be tested using air. - 🧠 ANSWER ✔✔true.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 3
STATEMENT. ALL RIGHTS RESERVED
, 4
when testing drainage system w/air, force air into system until there is... - 🧠
ANSWER ✔✔a uniform pressure of 5 psi or sufficient to balance a 10 inch colum
of mercury. (no air test on plastic piping )
drainage and vent final test shall be... - 🧠 ANSWER ✔✔visual (smoke)
gravity sewer test consists of plugging building sewer at point of connection w/
public sewer, filling building sewer with water testing with not less than... - 🧠
ANSWER ✔✔10 foot head of water. maintain for 15 minutes.
shower liner test. fill with water not less than... - 🧠 ANSWER ✔✔2 inches
measured at threshold.
hanger spacing: lead pipe - 🧠 ANSWER ✔✔continuous horizontal, 4 feet vertical
liquid combustion byproducts of condensing appliances shall be collected and
discharged to... - 🧠 ANSWER ✔✔an approved plumbing fixture or disposal area in
accordance with manufacturer's instructions.
appliances containing evaporator or cooling coils must be provided with... - 🧠
ANSWER ✔✔condensate drain systems.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 4
STATEMENT. ALL RIGHTS RESERVED
Journeyman Plumbing Test Study Guide
2025/2026 Exam Questions and Correct
Answers | New Update
more restrictive provisions apply - 🧠 ANSWER ✔✔where conflicts occur between
code and manufacture instructions.
what shall be 3rd party certified as conforming to NSF 14 - 🧠 ANSWER ✔✔all
plastic pipe, fittings and components.
all strainer plates on drain inlets shall be designed and installed so that all openings
are..? - 🧠 ANSWER ✔✔not greater than 1/2 inch (12.7) in least dimension.
pipes through foundation walls need..? - 🧠 ANSWER ✔✔a relieving arch or a pipe
sleeve which is 2 pipe sized bigger.
waterproofing joints at the roof and around vent pipes shall be made water tight by
use of....? - 🧠 ANSWER ✔✔lead, copper, steel, aluminum, plastic, or approved
flashing/flashing material.
exterior wall opening must be made...? - 🧠 ANSWER ✔✔water tight.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
,2
T or F: buried piping needs to be supported throughout it entire length. - 🧠
ANSWER ✔✔True
When backfilling the trench, that was over excavated - 🧠 ANSWER ✔✔backfill up
to installation level of bottom of pipe w/sand or gravel in layers no more than 6" in
depth and compacted after each placement.
when a rock is encountered trenching - 🧠 ANSWER ✔✔removed to not less than 3
inches below installation level. backfill with tamped sand.
when backfilling pipe systems crown of the pipe must be covered by...? - 🧠
ANSWER ✔✔12 inches of tamped earth.
T or F: truss members and components may be cut, drilled, notched or spliced. - 🧠
ANSWER ✔✔false. unless they obtain approval from a design professional.
hanger spacing: steel pipe - 🧠 ANSWER ✔✔every 12 ft horizontal 15 vertical
where hot water piping is bundled w/cold or hot water piping... - 🧠 ANSWER
✔✔each hot water pipe shall be insulated.
pipe sizes great than 4 inch need restraints for drain pipes at.. - 🧠 ANSWER ✔✔all
changes in direction and changes in diameter greater that 2 pipe sizes.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
,3
testing gauge required for 10 psi or less? - 🧠 ANSWER ✔✔has increments of
.10psi or less.
testing gauge required for >10 psi up to 100 psi - 🧠 ANSWER ✔✔increments of 1
psi
testing gauge required for greater than 100 psi - 🧠 ANSWER ✔✔increments of 2
psi
tests shall last not less than..? - 🧠 ANSWER ✔✔15 minutes
2 ways you can test a drainage system. - 🧠 ANSWER ✔✔in its entirety or in
sections.
if testing entire drainage system, all openings in piping shall be tightly closed
except..? - 🧠 ANSWER ✔✔the highest opening, and system shall be filled to point
of overflowing.
if drainage system is tested in sections, no section shall be tested with less than..? -
🧠 ANSWER ✔✔a 10 foot head of water.
T or F: plastic piping shall not be tested using air. - 🧠 ANSWER ✔✔true.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 3
STATEMENT. ALL RIGHTS RESERVED
, 4
when testing drainage system w/air, force air into system until there is... - 🧠
ANSWER ✔✔a uniform pressure of 5 psi or sufficient to balance a 10 inch colum
of mercury. (no air test on plastic piping )
drainage and vent final test shall be... - 🧠 ANSWER ✔✔visual (smoke)
gravity sewer test consists of plugging building sewer at point of connection w/
public sewer, filling building sewer with water testing with not less than... - 🧠
ANSWER ✔✔10 foot head of water. maintain for 15 minutes.
shower liner test. fill with water not less than... - 🧠 ANSWER ✔✔2 inches
measured at threshold.
hanger spacing: lead pipe - 🧠 ANSWER ✔✔continuous horizontal, 4 feet vertical
liquid combustion byproducts of condensing appliances shall be collected and
discharged to... - 🧠 ANSWER ✔✔an approved plumbing fixture or disposal area in
accordance with manufacturer's instructions.
appliances containing evaporator or cooling coils must be provided with... - 🧠
ANSWER ✔✔condensate drain systems.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 4
STATEMENT. ALL RIGHTS RESERVED
