Question: What's your acceptable failure rate?

For million-dollar water plant filters, why do people accept the documented and repeated failure of plastic block and triangular sheet metal lateral underdrains? And why keep specifying and purchasing the same failure-prone brands?

Documented Lateral-Type Underdrain Failures

Orthos personnel recently participated in a filter assessment training class in our home state of South Carolina. Numerous water plant operator attendees openly joked about their lateral underdrains and how many of them have failed.  There is a dirty little secret in our industry that Orthos intends to bring to light. Repairing or replacing a failed filter underdrain is very costly and may put the community’s water supply at risk.


This should not be, and our industry deserves far better.  In 24 years and with 200 filter installations, Orthos has never once, ever, had a monolithic filter underdrain failure.  This record of resiliency, reliability, and permanency is what utility clients demand and what should be delivered.  We know that Orthos is competitive on front-end costs (learn more here), and when the reinforced concrete underdrain is installed, it becomes part of the civil structure and will last likely a century.


We urge you to ignore the pleas from failure-prone manufacturers and make the right choice, Orthos.

Filter Success Rate
Filter Failures

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Orthos vs. Leopold:
Which “Horse” won in Shelbyville, KY?

In 24 years and 200 filter installations, ORTHOS has never had a filter underdrain failure. For decades, Orthos has delivered the resiliency, reliability, and longevity that clients demand. Click the button below to learn more about Orthos’ competitive front-end costs.

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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.