Fuseal Squared™ Double Containment Polypropylene Special Waste Piping System

Fuseal Squared® in Polypropylene or PVDF combines the advantages of corrosion-resistant and flame retardant drainage piping with the added security of double-containment.

Federal, state and local regulations have been created to protect our environment from industrial pollution. Protection of the soil and the groundwater table are of primary concern. The Fuseal Squared® system, with a modular design, is a reliable and cost-effective solution for conveyance of industrial and laboratory waste products. Excellent chemical and physical properties make the system ideal for handling corrosive waste solutions present in laboratory and industrial DWV applications where double containment is required.

Size Range:

  • 1½" - 8" inner pipe
  • 4" - 12" outer pipe

Pressure Rating:

  • -30 foot (15 PSI) maximum head pressure test for DWV applications
  • -Up to 50 PSI for pressure waste applications (subject to manufacturers review of design)

Operating Temperature:

  • 32°F - 212°F (0°C - 100°C)


  • Polypropylene Non-Flame Retardant Pipe (PPNFR)
  • Polypropylene Flame Retardant (PPFR)
Material Options

Depending on the application, Fuseal Squared™ is available in a flame-retardant and non-flame-retardant version. A PVDF carrier pipe can be used for applications above 212°F (100°C).

Chemical and Temperature-resistant

Fuseal Squared™ is capable of handling a variety of acids, bases, solvents and chemical waste solutions of up to 212°F (100°C), thanks to the excellent chemical and physical properties of its materials.

Easy jointing

Fuseal Squared™ pipes can be joined by way of electro-plastic welding or segmented fittings. The latter are manufactured using butt-welding processes for the primary joints.

Suitable system

Fuseal Squared™ can be easily connected to the Fuseal® Special Waste piping system without requiring unique fittings or tools. The closure couplings comply to ASME B31.3 code requirements.


Phil Schmidt

Product Manager