BACKFLOW PREVENTION FINAL EXAM
PREPARATION 2026 ACCURATE
QUESTIONS AND ANSWERS
●● Back Siphonage. Answer: A condition caused when a negative force
or vacuum is exerted and reverses the flow of gas, water or air to a
direction opposite the intended normal direction of flow.
●● Back Siphonage Preventer. Answer: A device designed to prevent
reverse flow in a water system, specifically back siphonage. The device
should be used only where no back pressure may occur.
●● Back Water Valve. Answer: A device or valve that is installed in a
sanitary sewer, storm drain or storm sewer to prevent sewage or drainage
from backing up.
●● Backflow. Answer: The reversal of flow from that normally intended.
Hydraulic conditions that cause backflow include back siphonage, back
pressure and aspiration.
●● Backflow Preventer. Answer: A device or an assembly used to
prevent contamination of the potable water supply through an actual or
potential cross-connection.
, ●● Backflow Preventer, Double Check Valve Backflow Preventer
Assembly or DCV. Answer: A plumbing appurtenance consisting of two
internally force loaded, independently acting check valves that operate
normally in the closed position; two tight-closing, resilient seated shut-
off valves; and four test *****.
●● Backflow Preventer, Dual Check Valve Type with Atmospheric Vent.
Answer: A plumbing appurtenance consisting of two internally force
loaded, independently acting check valves, designed to operate normally
in the closed position, separated by an intermediate chamber able to
automatically vent to atmosphere.
●● Backflow Preventer, Double Check Detector Backflow Prevention
Assembly or DCDA. Answer: A plumbing appurtenance consisting of
two internally force loaded, independently acting check valves, designed
to operate normally in the closed position; two tight-closing, resilient
seated shut-off valves; and four test *****. The assembly must include a
bypass line with a water meter and double check assembly.
●● Backflow Preventer, Dual Check Valve Type. Answer: A plumbing
appurtenance consisting of two internally force loaded, independently
acting check valves, designed to operate normally in the closed position.
●● Backflow Preventer, Dual Check Valves, Post-Mix Carbonated
Beverage Dispenser Type. Answer: A plumbing appurtenance used to
prevent carbonated water or carbon dioxide from backflow into a
potable water system. The assembly consists of two internally force
PREPARATION 2026 ACCURATE
QUESTIONS AND ANSWERS
●● Back Siphonage. Answer: A condition caused when a negative force
or vacuum is exerted and reverses the flow of gas, water or air to a
direction opposite the intended normal direction of flow.
●● Back Siphonage Preventer. Answer: A device designed to prevent
reverse flow in a water system, specifically back siphonage. The device
should be used only where no back pressure may occur.
●● Back Water Valve. Answer: A device or valve that is installed in a
sanitary sewer, storm drain or storm sewer to prevent sewage or drainage
from backing up.
●● Backflow. Answer: The reversal of flow from that normally intended.
Hydraulic conditions that cause backflow include back siphonage, back
pressure and aspiration.
●● Backflow Preventer. Answer: A device or an assembly used to
prevent contamination of the potable water supply through an actual or
potential cross-connection.
, ●● Backflow Preventer, Double Check Valve Backflow Preventer
Assembly or DCV. Answer: A plumbing appurtenance consisting of two
internally force loaded, independently acting check valves that operate
normally in the closed position; two tight-closing, resilient seated shut-
off valves; and four test *****.
●● Backflow Preventer, Dual Check Valve Type with Atmospheric Vent.
Answer: A plumbing appurtenance consisting of two internally force
loaded, independently acting check valves, designed to operate normally
in the closed position, separated by an intermediate chamber able to
automatically vent to atmosphere.
●● Backflow Preventer, Double Check Detector Backflow Prevention
Assembly or DCDA. Answer: A plumbing appurtenance consisting of
two internally force loaded, independently acting check valves, designed
to operate normally in the closed position; two tight-closing, resilient
seated shut-off valves; and four test *****. The assembly must include a
bypass line with a water meter and double check assembly.
●● Backflow Preventer, Dual Check Valve Type. Answer: A plumbing
appurtenance consisting of two internally force loaded, independently
acting check valves, designed to operate normally in the closed position.
●● Backflow Preventer, Dual Check Valves, Post-Mix Carbonated
Beverage Dispenser Type. Answer: A plumbing appurtenance used to
prevent carbonated water or carbon dioxide from backflow into a
potable water system. The assembly consists of two internally force
