Red Seal Plumbing Complete 2025 Practice Exam

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