Air gaps prevent contaminants or other liquids from being siphoned back into the water supply.

These drains work with air gaps to drain contaminated water from a system.

Caps cover openings on backflow preventers to prevent debris and contaminants from entering the valve, and tethers attach caps to valves to prevent accidental loss.

Freeze relief valves open and purge system liquids when process lines reach near-freezing temperatures to help prevent pipes from being damaged or bursting.