Where should regulators located above the floor line be protected from?

Regulators that are located above the floor line should indeed be protected from contamination caused by wheel spray and freezing rain. This is crucial because exposure to such contaminants can lead to the degradation of the regulator's components and potentially compromise its functionality. Contaminated regulators may result in improper gas flow, safety hazards, or even fail entirely, which could have serious implications in a propane system.

The protection from wheel spray is particularly important if regulators are situated near vehicle pathways where they could be exposed to debris and moisture from the wheels of passing vehicles. Similarly, freezing rain can create ice buildup, which not only burdens the regulator but also risks blockage of gas flow or damage to the unit.

This focus on preventing contamination ensures both the safety and efficiency of propane systems. Understanding this context helps in recognizing the importance of maintaining these components in an environment that minimizes exposure to elements that could cause them to fail or operate inefficiently.