Orthos has demonstrated a long track record of success in BAFs and BACs and with our monolithic design, repeatedly responds to utilities demands of resiliency, reliability, and permanency.

Velocities under a monolithic underdrain are relatively low, which reliably leads to good backwash and air scour distribution.  The plenum volume buffers changes and provides uniform water and air flowrates across the filter floor.

Monolithic filter plenums allow backwash water and air to move in two directions, this advantage is extremely important in BAFs/BACs.  


Visit our Library for information on select BAF/BAC installs:

There are three clear reasons for choosing Orthos Centurion™ monolithic filter underdrains for biologically active filters and contactors, known as BAFs and BACs:

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Resilient – Reliable – Sustainable – Permanent 

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Remember Orthos’ HUGE life cycle cost benefits– At the end of the filter’s life cycle (~25 years), in contrast to a complete plastic block or folded sheet metal underdrain overhaul, nozzles are simply replaced
potentially saving $Millions.

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