MASTER PLUMBING WSSC CERTIFICATION
TEST PAPER 2026 COMPLETE SOLUTIONS
GRADED A PLUS
◉ Before work commences when must a permit be obtained?
Answer: A permit must be obtained or a 100% (Double the normal
fee) will be charged.
◉ Underground Piping
Answer: All underground piping shall be left uncovered until
inspected.
◉ Inspector's Authority
Answer: The inspector has authority to stop work being done
dangerously or unsafely.
◉ Air Gap
Answer: The vertical distance between the opening of the water
supply and flood level rim of a receptacle.
◉ Branch
Answer: Any part of the piping system except mains, stacks or risers.
,◉ Branch Vent
Answer: A vent connecting individual vents with a stack vent or vent
stack.
◉ Building Drain
Answer: The lowest part of a drainage system which receives waste
from soil and waste pipes and connects to the building sewer.
◉ Building Sewer
Answer: Drainage piping that conveys waste from the building drain
to the public sewer or disposal system.
◉ Cleanout
Answer: Access opening in the drainage system used to remove
obstructions.
◉ Combination Fixture
Answer: Two or three compartment sink drained by a continuous
waste connected to one trap.
◉ Combinate Waste and Vent System
Answer: Horizontal wet venting system for sinks and floor drains.
, ◉ Common Vent
Answer: A single vent serving as the vent for two fixture drains.
◉ Critical Level
Answer: Is an elevation mark on a vacuum breaker setting the
minimum elevation device can be installed above the flood level rim
of a fixture.
◉ Cross Connection
Answer: Is an actual or potential tie between potable water and any
source of pollution or contamination.
◉ Developed Length
Answer: A measurement of piping taken along the centerline of pipe
and fittings
◉ Drain
Answer: any pipe that conveys waste water in the drainage system.
◉ Indirect Waste
Answer: Waste pipe that drains through an air gap to the drainage
system.
TEST PAPER 2026 COMPLETE SOLUTIONS
GRADED A PLUS
◉ Before work commences when must a permit be obtained?
Answer: A permit must be obtained or a 100% (Double the normal
fee) will be charged.
◉ Underground Piping
Answer: All underground piping shall be left uncovered until
inspected.
◉ Inspector's Authority
Answer: The inspector has authority to stop work being done
dangerously or unsafely.
◉ Air Gap
Answer: The vertical distance between the opening of the water
supply and flood level rim of a receptacle.
◉ Branch
Answer: Any part of the piping system except mains, stacks or risers.
,◉ Branch Vent
Answer: A vent connecting individual vents with a stack vent or vent
stack.
◉ Building Drain
Answer: The lowest part of a drainage system which receives waste
from soil and waste pipes and connects to the building sewer.
◉ Building Sewer
Answer: Drainage piping that conveys waste from the building drain
to the public sewer or disposal system.
◉ Cleanout
Answer: Access opening in the drainage system used to remove
obstructions.
◉ Combination Fixture
Answer: Two or three compartment sink drained by a continuous
waste connected to one trap.
◉ Combinate Waste and Vent System
Answer: Horizontal wet venting system for sinks and floor drains.
, ◉ Common Vent
Answer: A single vent serving as the vent for two fixture drains.
◉ Critical Level
Answer: Is an elevation mark on a vacuum breaker setting the
minimum elevation device can be installed above the flood level rim
of a fixture.
◉ Cross Connection
Answer: Is an actual or potential tie between potable water and any
source of pollution or contamination.
◉ Developed Length
Answer: A measurement of piping taken along the centerline of pipe
and fittings
◉ Drain
Answer: any pipe that conveys waste water in the drainage system.
◉ Indirect Waste
Answer: Waste pipe that drains through an air gap to the drainage
system.
