Defined Sump Floating Covers

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


    • A premium cover design for 20+ year service life
    • Uses floats and weights to accomodate 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


    • Most common use is in potable water applications
    • Used for the largest 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 Covers use floats and weights to create rainwater collection sumps in the cover and to accomodate changes in water level. The Defined Sump system is ideal for larger floating cover applications. A defined sump system can be fairly simple, or can be exceptionally complex depending on site conditions. Defined Sump Covers are used for all floating cover applications including potable water storage, odor control, evaporation control and contamination/dilution protection. A Defined Sump Cover is the most versatile cover system and can be used in any floating cover application especially 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 designs, installs, and maintains all types of floating covers.

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