Structurally reliable and hydraulically efficient, Roberts’ Wheeler underdrain systems offer an unsurpassed service life. Most remain in service after a half-century of continuous use.

Precast systems often offer the best solution for retrofit applications and installations where it is not feasible to create a flume to collect and distribute flow. Since they do not require an accessible plenum, they can be used on sites where changes in underdrain elevation cannot be tolerated.

Rehabilitation of Wheeler underdrains can be simply accomplished by installing Roberts’ Retroliners to restore the hoppers in a Wheeler underdrain to as new condition. Rehabilitation of existing Wheeler Bottom underdrains is a more cost-effective alternative to underdrain demolition and replacement.