Commercial Water Filtration

Whether you’re looking for reliable commercial sand filters, cartridge filters, or top-of-the-line D.E. filters, National Water Purifiers has it. Filters designed to offer longer cycle times and a variety of flow rates, National Water Purifiers has it. And on top of that, all Pentair filters offer durability that you can rely on.

Commercial Water Filtration



The THS Filter is an NSF – approved 50 psi rated tank with flow rates up to 535 gallons per minute. the filter shell is manufactured from a unique and lasting composite laminate design that makes winding unnecessary. Paracote, a water based, environmentally- friendly coating, provides remarkable surface protection.

  • Five sizes to 27 sq. ft.
  • Manway in front for easy access and smaller footprint
  • Manway with viewport available as option
  • 6 in. flanged connections, 4 in. victaulic on the THS 3461
  • Optional manual, semi-automatic, and automatic backwash systems for one and two tank systems
  • Two backwash controllers to choose from
  • Influent manifold distribution to prevent clogging
  • NSF approved from 5-20 gpm/sq. ft.



Heavy-Duty Fiberglass Sand Filter without Valves

All the same great performance and features of the original Triton® with maximum operating pressure of 75 psi for those special high pressure installations such as single pump in-floor cleaning systems.

  • Maximum Operating Pressure 75 psi


And Triton C-3

High Capacity Fiberglass Side Mount Sand Filter without Valves

This filter series features multiple diverters for increased filtration rates in commercial applications up to 20 GPM/Sq. Ft.

  • Maximum Operating Pressure 50 psi
  • Full 2 in. Drain
  • 8 in. opening for easy access to sand bed
  • The Triton C-3 features standard 3 in. flange connections
  • TR 100C-3 & TR 140C-3 models are available in black only



  • Access manway located on tank head, providing easy access for installation and service
  • Design does not rely on Adhesive Joints which can be sensitive to temperature variation and application error
  • Automatic and manual air relief systems
  • Media evacuation port and winterizing drain port
  • Vessels feature proprietary PARACOTE® All-Weather Exterior Coating with UV Inhibitors
  • Laterals are injection-molded with reverse ‘V’ slots
  • Side by Side tanks designed for as many tanks as needed


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