All Elastomer Duckbill Check Valves for Water Storage Tanks

Oct. 13, 2020
PROCO’s model #711 flanged duckbill valve features a patent pending low slope design.

Protecting potable water from contamination in a water storage tank is a critical facet of any utility’s work. They must protect the citizens’ health and honor the money spent by taxpayers treating the water for consumption.

Jacksonville Electric Authority (JEA) is a not-for-profit utility servicing over 350,000 water customers in Northeast Florida with over 110 million gallons of water each day. JEA relies on professional consulting engineers for designing its water treatment processes and water distribution infrastructure. JEA must protect the water supply and service its customers, and Proco Products has contributed to furthering JEA’s mission.

Mott MacDonald is an award-winning global consulting engineering group that originated in 1902 and now operates in over 50 countries. Mott MacDonald was selected by JEA to design a water distribution pump station that included a 2 MGD ground storage tank. The consulting engineer specified an all-rubber flanged duckbill check valve to protect the 16” tank drain line from cross contamination. The engineer specified that the valve’s duckbill not flare down and possibly cause interference with the box structure in which it is located. This was a perfect fit for Proco’s model #711 flanged duckbill valve with its patent­-pending low slope design. The 16” valve duckbill extends only 2” below the pipe invert; this slight slope ensures no standing water upstream in the pipe. An added benefit of Proco’s duckbill check valve is that it won’t rust or corrode like a metal alternative.

The company offers 10 different styles of PROFLEX check valves with various end connections. The sizes range from 1” to over 96” in size. Barnacle- and algae-­resistant neoprene reduces maintenance, and ANSI/NSF-61 and special configurations are available. WW

Proco Products has been making quality rubber products for over three decades. These products include expansion joints, pipe penetration seals, PROFLEX duckbill outfall and inline check valves. Learn more at