Orthos Liquid Systems

Providing filtration solutions since 1978, Orthos Liquid Systems, Inc., is the leading manufacturer of nozzle-based filter systems and nozzle products in water/wastewater treatment.

What is the Poseidon Filtration System®? 

Orthos nozzle-based monolithic underdrain systems have defined reliability for the past 20 years — we have never had an underdrain system failure. Poseidon extends this repetitious success by using our in-house engineering design expertise to provide complete filter systems to municipal clientele.

With increasing water quality concerns regarding disinfection byproducts, nitrogen, phosphorus, taste, and odor, Poseidon delivers a systems approach that includes all requisite controls and components.

Nozzle-Based Filter Systems & Nozzle Products in Water and Wastewater Treatment

When it comes to filter performance of a nozzle underdrain system, it is vital that the nozzle being used is properly designed to meet your filter specifications. With multiple design options such as material, mounting style, flow rate capacity and tailpipes for air scour, we are sure that Orthos Liquid Systems has a filter nozzle that will meet your requirements.  We are capable of replacing any OEM design on the market by supplying a direct replacement, or if required, redesigning the nozzle to ensure optimum filter performance.


ORTHOS manufactures the broadest line of filter nozzles/strainers, with MILLIONS of combinations of screen slot sizes, thread types, flow characteristics, and air scour tube construction, along with adapters and other accessories.