Skip to main content


Inlet Flap Gates


The Fontaine-Aquanox SERIES 61 Inlet flap gates consist of a circular flap gate mounted inside a box at the outlet of a manhole. The front panel is removable for easy access to the flap gate. Inlet flap gates are mounted to the face of the wall in either circular (RM) or rectangular manholes (CW).

Serie 61


In cold climates, it can be useful to avoid having a flap gate located at the outlet of a pipeline, when there is the risk of ice formation. Other reasons my also require to avoid having a flap gate at the outlet of the pipe line. SERIES 61 Inlet flap gates will allow water to enter the pipeline at its inlet and prevent it from coming back.

The hinges of these flap gates use a self-lubricating UHMWPE bushing to prevent metal-to-metal contact, thereby reducing friction and easing the operation. Even if the flap gate is not used for a long period of time, there is no risk that the hinges will rust or seize.

A resilient lip seal is used to achieve low leakage between the frame and flap. All our Flap Gates are made with high quality materials, such as 304L or 316L grade stainless steel, ensuring the best corrosion resistance for a long life in the toughest environments with virtually no maintenance required.

Buy this product

Get a quote

Email us at or contact your local representative to obtain a quotation.

Technical documents