Defined Sump Floating Covers

Defined Sump Floating Covers are the standard for potable water floating covers for all sizes of reservoirs.


    • A premium cover design with 20+ year service life
    • Uses floats and weights to accommodate changes in water level
    • Prevents rainwater and dust from entering the pond
    • Can routinely walk on the cover for maintenance
    • Can be inflated for inspection and cleaning


    • Commonly used in potable water applications
    • Used for the large water ponds
    • Sometimes used for odor control in water treatment
    • Can be adapted to irregularly shaped ponds
    Defined Sump Floating Covers Specifications

Product Description

Defined Sump Floating Covers use floats and weights to create rainwater collection sumps in the cover and to accommodate changes in water level. The Defined Sump system is ideal for larger floating cover applications. A defined sump system can be relatively simple or can be exceptionally complex, depending on site conditions. Defined Sump Covers are highly versatile and can be used for all floating cover applications, including potable water storage, odor control, evaporation control, and contamination/dilution protection. They are especially suitable for use on large ponds or ponds with an irregular shape. Layfield's Defined Sump Cover designs, installation techniques, and inspection/maintenance protocols fully meet the requirements of local regulations, such as the AWWA M25 Lining and Floating Cover Guidelines and AWWA California-Nevada Reservoir Floating Cover Guidelines. Layfield can design, install and maintain all types of floating covers.

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"We do appreciate you coming all this way to see us. We get other supplies just showing up and considering we have 50 construction people to supervise we don't have time for them. You did it right by setting it up in advance and letting us know your takeaways. This made for beneficial use of our time." Matthew, Civil & Commercial Construction Company

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About Environmental Containment

Layfield Environmental Containment is a vertically integrated company involved in the manufacturing, fabrication, installation, and maintenance of high performance geomembranes, floating covers, and specialty geosynthetics. We work with end users, consulting engineers and contractors to deliver products and services that protect the environment. Layfield Environmental Containment has strategic locations across North America and internationally.

Latest News

Pittsburgh Water & Sewer Authority announced Layfield Geosynthetics was awarded the Highlands 2 Reservoir CSPE Liner and Floating Cover Replacement

November 3, 2021

Layfield Geosynthetics (USA) is pleased to announce the recent award for the supply and installation of a new CSPE liner and floating cover system for the Pittsburgh Water and Sewer Authority’s Highland 2 Reservoir.

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