Backflow Prevention

Front

When should atmospheric vacuum breakers be installed?

Back

When there is a risk of back siphonage

Front

What is the consequence of using a backflow preventer not designed for the system?

Back

It may fail, resulting in backflow

Front

What is the minimum air gap required for lavatories and other fixtures with an effective opening not greater than 1/2 inch in diameter when away from a wall?

Back

1 inch

Front

Fill in the blank: The minimum air gap for sink, laundry trays, and gooseneck back faucets with effective openings not greater than 3/4 inch in diameter, when close to a wall, is ____ inches.

Back

2 1/2

Front

Hose-connection vacuum breakers are designed for use where there is a ________.

Back

hose connection

Front

What should not be installed downstream from an atmospheric vacuum breaker?

Back

Shutoff valves

Front

Fill in the blank: In a residential setting, at least one _______ is typically required to prevent backflow.

Back

Hose bibb

Front

Which material is used for the body of the dual-check valve backflow preventer assembly? Options: Stainless Steel, Bronze, Plastic, Iron

Back

Bronze

Front

In the Backflow Blotter incident, what chemical was involved in the contamination?

Back

Sodium Hydroxide

Front

What year did the backflow incident in Lacy’s Chapel occur?

Back

1986