BAT Backflow Assembly Tester Prevention Methods 2

Question 1

Which backflow prevention assembly is the ONLY type approved for use on high-hazard connections to the potable water supply?

Accepted Answer

Reduced pressure principle assembly

Answer

The reduced pressure principle (RP) assembly is required for high-hazard (toxic/health hazard) connections because it provides the highest level of protection via its relief valve.

Question 2

During a field test of a double check valve assembly, the tester finds that check valve #1 holds at 3.0 psi and check valve #2 holds at 2.5 psi. What is the correct interpretation?

Accepted Answer

The assembly passes because both checks hold above 1.0 psi

Answer

For a DC assembly, both check valves must hold tight at a minimum of 1.0 psi differential; 3.0 and 2.5 psi both exceed this threshold, so the assembly passes.

Question 3

A pressure vacuum breaker (PVB) is installed 6 inches above the highest downstream outlet. Why is this installation non-compliant?

Accepted Answer

PVBs must be installed at least 12 inches above the highest downstream outlet

Answer

ASSE 1020 and most jurisdictional codes require a PVB to be installed a minimum of 12 inches above the highest downstream outlet or point of use.

Question 4

What condition causes the relief valve of an RP assembly to open during normal system operation?

Accepted Answer

The differential pressure across check #1 falls below 2 psi

Answer

The RP relief valve is designed to open and discharge to atmosphere when the differential pressure across check valve #1 falls below 2 psi, preventing backpressure or backsiphonage from reaching the supply.

Question 5

An atmospheric vacuum breaker (AVB) is being tested in the field. Which statement about field testing AVBs is correct?

Accepted Answer

AVBs are not field testable and rely on visual inspection only

Answer

Atmospheric vacuum breakers (ASSE 1001) are non-testable assemblies; they are assessed through visual inspection of the air-inlet valve and float mechanism rather than a differential pressure test.

(BAT) Backflow Assembly Tester Certification Practice Test

(BAT) Backflow Assembly Tester Certification Practice Test

BAT Backflow Assembly Tester Prevention Methods 2