Red Valve's Diffuser Check Valves are specified by consulting engineers worldwide for new and retrofit outfall lines because of their outstanding advantages.

Diffuser ports are the most important item on any marine outfall line, since their correct sizing and configuration assure the proper plume dilution of treated and untreated effluent into the marine environment. Diffuser systems in the past were designed with open ports or nozzles in the pipe. Ports didn't prevent debris and other intrusions at low flow, and mechanical check valves were not installed since the salt water and debris in the system would render them inoperative.

Today the Red Valve Diffuser Check Valve is being used on hundreds of municipal and industrial outfall lines. The elastomer construction, which is custom-built to your specifications has proven to be extremely effective in enhancing jet velocity, and providing greater surface area for diffusion when compared to fixed orifices. They offer less variation in flow rates, and prevent intrusions of sand, stones and marine organisms which disturb and drastically reduce the designed discharge. Their all-rubber construction is impervious to salt water corrosion, and their flexibility prevents damage or blockage from debris.

Diffuser Valves create a rectangular plume, versus a columnar plume, providing a greater surface area for diffusion, greater jet velocity, and prevent entry of debris into the header pipe.