PLUMBING RED SEAL EXAM
PREPARATION GUIDE COMPLETE
SOLUTIONS 2026/2027
Hydrogen Sulphide removal methods - ANSWERSManganese Zeolite filters, Aeration,
Chlorination
Quick connect adaptor for well system - ANSWERSPit less Adapter
Improperly graded pipe from well - ANSWERSIt's difficult to maintain pressure and
prime the pump
Water seal requirement for acid waste trap - ANSWERS2''
Steps for creating a soldered joint - ANSWERSMeasure the tube, Mark the length, Cut,
Ream, Clean the tubing, Flux, Assemble and heat the tube and fitting, Apply Solder,
Wipe Clean
Steps for creating a brazed joint - ANSWERSMeasure the tube, Mark the length, Cut,
Ream, Clean the tubing, Assemble and heat the tube and fitting, Apply Solder, Wipe
Clean
Minimum size of water distribution pipe - ANSWERS½''
Maximum flushometer water closets into 80mm stack - ANSWERS6
Reason for salty water after regeneration cycle - ANSWERSToo short of a rinse cycle
Class A fires - ANSWERSOrdinary Combustibles (Materials such as wood, paper, cloth,
rubber and many plastics)
Class B fires - ANSWERSFlammable liquids and Gasses (Acetylene, propane, and
natural gas, flammable liquids such as gasoline and diesel fuel act as fuels for Class B
fires)
Class C fires - ANSWERSElectrical
Class D fires - ANSWERSCombustible Metals (Materials such as magnesium, titanium,
Zicronium, sodium, and potassium)
Recommended floor surface temperature - ANSWERS77 deg F
, Best location for primary circulator on Hydronic heating system -
ANSWERSDownstream of a diaphragm expansion tank
Installation to prevent freezing after firefighters disconnect - ANSWERSball drip and
check valve
What occurs in the septic chamber - ANSWERSanaerobic bacteria
Distance of water meter from entrance or wall - ANSWERS12''
Sizing of offset relief vent - ANSWERSAn offset relief vent for an offset is sized to be
one size smaller than the stack vent and must comply with Article 2.5.7.1.
Premise protection device for commercial buildings - ANSWERSDCVA
Proper order of sequence for fittings surrounding steam trap - ANSWERSisolation
valve, strainer, union, steam trap, possible check valve
Height for toe-boards on scaffolding - ANSWERS3.5m
Type of treatment by water softener - ANSWERSIon Exchange
Method to vent gases from pressure tank - ANSWERSAir volume Control
Installation for laboratory sink receiving bio-hazardous waste - ANSWERSSilver Braze
Length consideration for sizing relief vents - ANSWERSRelief Vents
Height of backfill for underground piping - ANSWERS300mm
Use of cross fitting in DWV system - ANSWERSA cross fitting may not be used in a
DWV system except to connect Four Vents
Formation of ½" extracted tee - ANSWERS¾'' Type K
Pressure reducing valve installation requirement - ANSWERSA pressure reducing valve
must be installed if the water service pressure is above 80PSI (550KPA)
Purpose of the distribution box - ANSWERSTo distribute and inspect the laterals into
the distribution field
Best option for septic field with high water table - ANSWERSInstall a mound field
Installation order for Radon piping system - ANSWERSManometer, fan and gooseneck
PREPARATION GUIDE COMPLETE
SOLUTIONS 2026/2027
Hydrogen Sulphide removal methods - ANSWERSManganese Zeolite filters, Aeration,
Chlorination
Quick connect adaptor for well system - ANSWERSPit less Adapter
Improperly graded pipe from well - ANSWERSIt's difficult to maintain pressure and
prime the pump
Water seal requirement for acid waste trap - ANSWERS2''
Steps for creating a soldered joint - ANSWERSMeasure the tube, Mark the length, Cut,
Ream, Clean the tubing, Flux, Assemble and heat the tube and fitting, Apply Solder,
Wipe Clean
Steps for creating a brazed joint - ANSWERSMeasure the tube, Mark the length, Cut,
Ream, Clean the tubing, Assemble and heat the tube and fitting, Apply Solder, Wipe
Clean
Minimum size of water distribution pipe - ANSWERS½''
Maximum flushometer water closets into 80mm stack - ANSWERS6
Reason for salty water after regeneration cycle - ANSWERSToo short of a rinse cycle
Class A fires - ANSWERSOrdinary Combustibles (Materials such as wood, paper, cloth,
rubber and many plastics)
Class B fires - ANSWERSFlammable liquids and Gasses (Acetylene, propane, and
natural gas, flammable liquids such as gasoline and diesel fuel act as fuels for Class B
fires)
Class C fires - ANSWERSElectrical
Class D fires - ANSWERSCombustible Metals (Materials such as magnesium, titanium,
Zicronium, sodium, and potassium)
Recommended floor surface temperature - ANSWERS77 deg F
, Best location for primary circulator on Hydronic heating system -
ANSWERSDownstream of a diaphragm expansion tank
Installation to prevent freezing after firefighters disconnect - ANSWERSball drip and
check valve
What occurs in the septic chamber - ANSWERSanaerobic bacteria
Distance of water meter from entrance or wall - ANSWERS12''
Sizing of offset relief vent - ANSWERSAn offset relief vent for an offset is sized to be
one size smaller than the stack vent and must comply with Article 2.5.7.1.
Premise protection device for commercial buildings - ANSWERSDCVA
Proper order of sequence for fittings surrounding steam trap - ANSWERSisolation
valve, strainer, union, steam trap, possible check valve
Height for toe-boards on scaffolding - ANSWERS3.5m
Type of treatment by water softener - ANSWERSIon Exchange
Method to vent gases from pressure tank - ANSWERSAir volume Control
Installation for laboratory sink receiving bio-hazardous waste - ANSWERSSilver Braze
Length consideration for sizing relief vents - ANSWERSRelief Vents
Height of backfill for underground piping - ANSWERS300mm
Use of cross fitting in DWV system - ANSWERSA cross fitting may not be used in a
DWV system except to connect Four Vents
Formation of ½" extracted tee - ANSWERS¾'' Type K
Pressure reducing valve installation requirement - ANSWERSA pressure reducing valve
must be installed if the water service pressure is above 80PSI (550KPA)
Purpose of the distribution box - ANSWERSTo distribute and inspect the laterals into
the distribution field
Best option for septic field with high water table - ANSWERSInstall a mound field
Installation order for Radon piping system - ANSWERSManometer, fan and gooseneck
