BACKFLOW PREVENTION ASSEMBLY
TESTER TRAINING QUESTIONS WITH
ACCURATE ANSWERS
Direct and indirect ANSW✅✅2 types of cross connections
Direct cross connection ANSW✅✅Subject to backpressure or back siphonage
Indirect cross connection ANSW✅✅Subject to back siphonage only
Aspirator/Venturi effect ANSW✅✅Condition where undersized water pipes carry water under a
high velocity past or through a small opening and will cause a back siphonage effect.
Non health hazard and health hazard ANSW✅✅2 degrees of hazard
Pollutant ANSW✅✅Non health hazard, low hazard, and will not cause illness or death.
Contaminant ANSW✅✅Health hazard, high hazard, and causes illness or death.
Five means of preventing backflow ANSW✅✅Air gap separation, reduced pressure principle
Assembly, double check valve Assembly, pressure vacuum breaker, atmospheric vacuum breaker.
Airgap ANSW✅✅2x Supply line diameter but not less than 1".
Approved airgap separation ANSW✅✅Back siphonage, backpressure, containment, and pollutant
Reduced pressure principle assembly (RP) ANSW✅✅back siphonage, Backpressure, contaminant,
and pollutant
Double check vale assembly ANSW✅✅Does not prevent against contaminant, but does prevent
against back siphonage, backpressure, and pollutants
, Proper installation for DC and RP ANSW✅✅Minimum 12" above grade, maximum 36" above
grade, accessibility for testing and repair, and weather/vandalism protection (if needed) with
adequate drainage.
Proper installation for DC and RP ANSW✅✅Double check valve assemblies and reduce pressure
backflow preventers should be installed vertically, if they have been specifically approved for vertical
orientation.
Pressure Vacuum Breaker PVB ANSW✅✅Must be installed 12" above grade
Pressure Vacuum Breaker (PVB) ANSW✅✅Does not protect against backpressure, but will protect
against back siphonage, contaminants, and pollutants.
Atmospheric Vacuum Breaker (AVP) ANSW✅✅Does not protect against backpressure, but will
protect against back siphonage, contaminants, and pollutants.
Atmospheric Vacuum Breaker (AVP) ANSW✅✅Must be 6" above grade and has intermittent (non-
continuous use)
Indirect or direct ANSW✅✅What kind of Cross connection is it?
Pollutant or contaminant ANSW✅✅What is the degree of hazard?
Water supply protection ANSW✅✅The supply line and fittings for every plumbing fixture shall be
protected so as to prevent backflow.
Dual Check valve type backflow preventer ANSW✅✅Non testable
Barometric Loop ANSW✅✅Shall proceed the point of connection and shall extend vertically to a
height of 35 feet. This shall only be utilized as an atmospheric-type or pressure-type vacuum
breaker.
Backflow test gages ANSW✅✅Include three detachable colour coded hoses.
TESTER TRAINING QUESTIONS WITH
ACCURATE ANSWERS
Direct and indirect ANSW✅✅2 types of cross connections
Direct cross connection ANSW✅✅Subject to backpressure or back siphonage
Indirect cross connection ANSW✅✅Subject to back siphonage only
Aspirator/Venturi effect ANSW✅✅Condition where undersized water pipes carry water under a
high velocity past or through a small opening and will cause a back siphonage effect.
Non health hazard and health hazard ANSW✅✅2 degrees of hazard
Pollutant ANSW✅✅Non health hazard, low hazard, and will not cause illness or death.
Contaminant ANSW✅✅Health hazard, high hazard, and causes illness or death.
Five means of preventing backflow ANSW✅✅Air gap separation, reduced pressure principle
Assembly, double check valve Assembly, pressure vacuum breaker, atmospheric vacuum breaker.
Airgap ANSW✅✅2x Supply line diameter but not less than 1".
Approved airgap separation ANSW✅✅Back siphonage, backpressure, containment, and pollutant
Reduced pressure principle assembly (RP) ANSW✅✅back siphonage, Backpressure, contaminant,
and pollutant
Double check vale assembly ANSW✅✅Does not prevent against contaminant, but does prevent
against back siphonage, backpressure, and pollutants
, Proper installation for DC and RP ANSW✅✅Minimum 12" above grade, maximum 36" above
grade, accessibility for testing and repair, and weather/vandalism protection (if needed) with
adequate drainage.
Proper installation for DC and RP ANSW✅✅Double check valve assemblies and reduce pressure
backflow preventers should be installed vertically, if they have been specifically approved for vertical
orientation.
Pressure Vacuum Breaker PVB ANSW✅✅Must be installed 12" above grade
Pressure Vacuum Breaker (PVB) ANSW✅✅Does not protect against backpressure, but will protect
against back siphonage, contaminants, and pollutants.
Atmospheric Vacuum Breaker (AVP) ANSW✅✅Does not protect against backpressure, but will
protect against back siphonage, contaminants, and pollutants.
Atmospheric Vacuum Breaker (AVP) ANSW✅✅Must be 6" above grade and has intermittent (non-
continuous use)
Indirect or direct ANSW✅✅What kind of Cross connection is it?
Pollutant or contaminant ANSW✅✅What is the degree of hazard?
Water supply protection ANSW✅✅The supply line and fittings for every plumbing fixture shall be
protected so as to prevent backflow.
Dual Check valve type backflow preventer ANSW✅✅Non testable
Barometric Loop ANSW✅✅Shall proceed the point of connection and shall extend vertically to a
height of 35 feet. This shall only be utilized as an atmospheric-type or pressure-type vacuum
breaker.
Backflow test gages ANSW✅✅Include three detachable colour coded hoses.
