BAT Backflow Assembly Field Testing Procedures

Question 1

What is the first step when performing a field test on a backflow prevention assembly?

Accepted Answer

Close the #1 shutoff valve to isolate the assembly

Answer

The #1 (upstream) shutoff valve is closed first to isolate the assembly from supply pressure before test equipment is attached.

Question 2

Which test cocks are used when field testing a Reduced Pressure Zone (RPZ) assembly?

Accepted Answer

Test cocks 1, 2, and 3

Answer

RPZ assemblies have three test cocks — #1 upstream of check valve 1, #2 in the zone between the checks, and #3 downstream of check valve 2 — all three are used during testing.

Question 3

What minimum differential pressure reading across check valve #1 on an RPZ assembly is required for a passing field test?

Accepted Answer

5.0 psi

Answer

USC and AWWA standards require check valve #1 on an RPZ assembly to hold a minimum differential of 5.0 psi to pass the field test.

Question 4

What is the purpose of the bypass needle valve on a backflow prevention test kit?

Accepted Answer

To slowly equalize pressure between the high and low pressure hoses

Answer

The bypass needle valve allows the tester to slowly bleed pressure between hoses for accurate differential gauge readings without spiking or damaging the gauge.

Question 5

What minimum differential pressure must each check valve hold during a field test of a Double Check Valve Assembly (DCVA)?

Accepted Answer

1.0 psi

Answer

AWWA standards require each check valve in a DCVA to hold a minimum differential pressure of 1.0 psi during field testing.

(BAT) Backflow Assembly Tester Certification Practice Test

(BAT) Backflow Assembly Tester Certification Practice Test

BAT Backflow Assembly Field Testing Procedures