Red Valve Company and Tideflex Technologies
Solving your most demanding flow control applications—this has been the single driving force behind Red Valve Company and Tideflex Technologies since our founding in 1953. Today, we remain dedicated to customer needs with valve products and engineering services that set the standard for the toughest applications. Red Valve Company and Tideflex Technologies are the world’s largest manufacturer and supplier of pinch valves, slurry knife gate valves, annular seal pressure sensors, expansion joints, duckbill check valves, potable water mixing systems, aeration systems and effluent diffusers. We have become a preferred supplier for municipalities and industrial plants worldwide.


600 North Bell Ave.
Carnegie, PA 15106-0548
United States
Phone: 412.279.0044
Fax: 412.279.7878

Products + Services

The Tideflex TF-1’s bill is curved and returns to a closed position every time, achieving a tight seal. The valve’s strong spine provides long-term performance while handling water weight. Those who specify the TF-1 will receive maintenance-free backflow prevention.  more
  • The Tideflex TF-1’s bill is curved and returns to a closed position every time, achieving a tight seal. The valve’s strong spine provides long-term performance while handling water weight. Those who specify the TF-1 will receive maintenance-free backflow prevention.  more
  • The Tideflex Mixing System (TMS) greatly improves drinking water quality in water storage reservoirs. The TMS is a combination of patented Tideflex check valve technology and a piping manifold that separates inlet and outlet. The TMS can be installed in new or existing water storage tanks of all types to eliminate stagnation and short-circuiting. Operating on differential pressure that is already... more
  • The Tideflex CheckMate inline check valve is ideal for backflow prevention. In outfalls, storm water applications, CSO applications and SSO applications, the CheckMate’s custom-engineered design eliminates costly backflow from oceans, rivers and interceptors. A major advantage of the CheckMate is low head loss. The valve opens to near full pipe diameter, maximizing the flow capacity of the... more
  • The “Valve Selection Guide for Wastewater Treatment Plants” details Red Valve’s total system approach to wastewater treatment. A detailed treatment plant layout illustrates applications for products at every stage, from influent flow through effluent discharge. Large, full-color photos illustrate products in wastewater treatment applications. For more information on the company’s full line of... more


Your Winning Move for Backflow Prevention
Preventing Backflow with Inline Check Valves

Restraining the River

The Metropolitan Sewer District (MSD) of Greater Cincinnati had two combined sewer overflow (CSO) manholes at the Mill Creek Interceptor that became surcharged and... more

Polar Vortex Is No Challenge

The winter of 2013 and 2014 featured a “polar vortex”—a severe and sustained arctic blast that closed down businesses, schools, roads and airports across the country for... more

Massachusetts City Installs Check Valves to Prevent Flooding

In 2006, the Merrimac River flooded into two residential areas in a Massachusetts city. Twenty-five homes were damaged during the incident. In the past, this city had... more

Inline Check Valve Prevents Storm Water Backflow in Michigan Community

During typical rain events, a storm drain located in a Michigan community would rise significantly and backflow into a connecting storm sewer, causing flooding on... more

Keeping Odors and Flooding in Check

A neighborhood in Kentucky was plagued by unpleasant odors that emanated from the community’s combined sewer system (CSO). The odors originated in a collection basin... more

Elastomeric Inline Check Valves for Control and Prevention of Sanitary Sewer Overflow

It is costly for municipalities when sanitary sewer overflow (SSO) occurs. SSO can happen in a residential, commercial or institutional building, as well as in a street... more

All Elastomeric Inline Duckbill Check Valves for Prevention of Sewage Backflow in Lift Stations and Wastewater Treatment Plants

It can be costly for municipalities when lift station check valves fail and leak sewage back into the wet well from force mains, although it is an everyday occurrence.... more

The Science of Mixing and Improving Water Quality in Water Storage Tanks

Water storage tanks and reservoirs are a critical component of distribution systems, yet they can pose a significant challenge for water utilities as they often have a... more

Tideflex Appoints Product Specialist

Tideflex Technologies, a division of Red Valve Co. Inc., appointed Paul Handke as the Tideflex Mixing System (TMS) product manager. more

Pass-Active Tideflex Mixing System Utilizes Recirculation Pump

The zero-maintenance passive Tideflex Mixing System (TMS) has been installed in over 3,000 water tanks, has been extensively CFD- and scale-modeled and has proven to... more

Elastomer Valves Provide Solutions

The most critical parts of any valve are its engineering and construction. Elastomer valves are built to specifically provide low maintenance and long life spans in the... more

Clearer Channels

Wastewater treatment facility installs coarse bubble diffusers with removable assemblies for channel aeration and mixing The Easterly Wastewater Treatment Facility, part... more

Preserving Water Quality in Distribution Systems

Mixing systems research and developments for water storage tanks and reservoirsDistribution storage tanks and reservoirs could have a negative impact on water quality... more

Product Categories



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