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Piping Systems & Welding

Plastic Double Containment Piping Systems

Poly-Flo® PP-R and Advanced PE Co-extruded Double Containment Piping System

Asahi/America's newly reengineered Poly-Flo® PP-R and Advanced PE co-extruded double containment piping system offers unique construction saving time and labor on each project. Low cost and easy installation makes Poly-Flo® the ideal system for drainage systems, pressurized transfer lines and industrial applications needing up to 4" carrier pipe.

Available in 1x1-1/2, 2x3 and 4x6 size ranges, Poly-Flo® is design for installations with tights pace constraints, water treatment facilities using multiple chemicals, outside applications, due to UV resistance and systems where thermal expansion & contraction are present . In addition to pipe, the system includes full pressure fittings, drainage fittings, machined fittings and specialty dogbones for all standard size ranges.

Poly-Flo® is available in black PE and euro grey PP-R and operates at 150psi at 68 F. The newly designed system features similar ID, OD and Annular space to the old system while providing cost savings vs fabricated system, uniform construction and higher safety features. The co-extrusion allows Poly-Flo to act like a single wall piping system by offer fewer concerns during expansion and connection and eliminates separation during directional drilling. The SDR design allows for full pressure rating while requiring no special welding clamps during joining. Polyflo can be easily joined using standard welding equipment and does not require special inserts.


In the news

Poly-Flo Advanced polyethylene pipe protects new Lake Huron water supply line

Data Sheet


Ideal Applications Include:

Installations with tights pace constraints; water treatment facilities using multiple chemicals; outside applications, due to UV resistance; systems where thermal expansion & contraction are present

Supply Range

Pipes & Fittings:

1x1-1/2, 2x3, 4x6 (32mmx50mm, 63mmx90mm, 110mmx160mm)


150psi at 68 F and Drainage


Advanced PE and PP-R

Available Fittings:

Full Pressure Fittings, Drainage Fittings, Machined Fittings, Dogbones



  • Cost savings vs. fabricated systems
  • More uniform construction
  • Higher safety


  • Acts like single wall pipe
  • Fewer concerns during expansion & contraction
  • Eliminate separation during directional drilling

SDR Design

  • Full pressure rating
  • No special welding clamps
  • Similar logistics to single wall products







Custom Options

-Longer Pipe Lengths

-New tool

 -Asahi America Rib Removing Tool