Red Seal Plumbing Practice Exam

When installing a Reduced Pressure Principle backflow Preventer (RP), what is required to complete the piping installation?

1. A pressure valve

2. A bypass line

3. An air gap fitting on the relief port

4. A heat tape

The correct answer is: An air gap fitting on the relief port

The reason why option A, a pressure valve, is incorrect is because a Reduced Pressure Principle backflow Preventer (RP) already functions as a pressure valve, so it would be redundant to install another one. The reason why option B, a bypass line, is incorrect is because a Reduced Pressure Principle backflow Preventer (RP) does not require a bypass line for proper installation. The reason why option D, a heat tape, is incorrect is because a heat tape is used for preventing freezing in water pipes, but it is not necessary for the installation of a Reduced Pressure Principle backflow Preventer (RP). Option C, an air gap fitting on the relief port, is the correct answer because the RP must have an air gap fitting on the relief port to prevent any backflow contamination from occurring. This fitting ensures that there is a physical barrier between the potable water supply and any