Fuseal 25/50™ PVDF Corrosive Waste


Fuseal 25/50™ PVDF piping systems are engineered to solve many of the problems associated with return air plenum piping or handling aggressive chemicals at elevated temperatures.

PVDF provides a very broad range of chemical resistance, thermal stability as well as a low flame spread and smoke density when tested in accordance to the ASTM E84.

Product Overview

Technical Data:

Size Range:

  • 1½" - 6"

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:

  • -4°F - 284°F (-20°C - 140°C) 

Joining Technology:

  • Electrofusion

Standard Ratings:

  • ASTM D1599
  • ASTM D2122
  • ASTM D3222
  • ASTM D3311
  • ASTM D4101
  • ASTM E84
  • ASTM F1290
  • ASTM F1673
  • UL 723
  • NFPA 255


  • Polyvinylidene Fluoride (PVDF)

Fields of Application:

  • Corrosive Waste Drainage for return air plenums
  • Corrosive Waste Drainage at elevated temperatures
  • Life Sciences
  • Chemical Process Industry
  • Food and Beverage


  • Can withstand intermittent temperatures up to 284°F (140°C)
  • UL certified to be installed in air plenum areas due to its flame and smoke retardance
  • Outstanding chemical and corrosion resistance
  • Maintenance-free service with low installation cost
  • Electrofusion joints
  • Easy to operate electrofusion machines



2.1 SPECIAL WASTE PIPE AND FITTINGS (For Return Air Plenum/High Temperature - Flow)

  1. Pipe and fittings 1½” through 6” for special waste pipe and fitting systems shall be installed in plenum rated areas and/or conveying high temperature flow streams shall be manufactured of Schedule 40 PVDF (polyvinylidene fluoride), Fuseal 25/50™ as produced by GF Piping Systems (or approved equal). All system components shall conform to ASTM D3222 and be defined in ASTM F1673 “Standard Specification for Polyvinylidene Fluoride (PVDF) Corrosive Waste Drainage Systems.”

  2. Flammability requirements are based on ASTM D635 “Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Self Supporting Plastics in a Horizontal Position.” The pipe and fittings shall have a flame spread of less than 25 and smoke developed index of less than 50 when tested in accordance to ASTM E84, UL723 and NFPA 255.

  3. Pipe shall be produced to Schedule 40 Iron Pipe Size dimensional standards and shall meet the dimensions and tolerances for outside diameters. All pipe shall be marked with “+GF+, PVDF, Schedule 40 Size, ASTM F-1673, E84, UPC, UL Classified date stamp, Made in USA”, stampings clearly legible on the outer wall of the pipe.

  4. Fittings shall be legibly marked as per the requirements of ASTM F1673 with the following: Molded Fittings – Part No., +GF+ PVDF, Fitting Size, ASTM F1673, UPC, USA.

  5. Each fusion coil shall consist of a polyvinylidene fluoride (PVDF) jacketed wire, mandrel wound, and heat-fused on the outer surface. The wire is inserted into the fitting socket at the factory and is designed to have a snug fit. The wire leads are terminated via a duplex receptacle connector for attachment to the fusion unit cable(s).

  6. Any custom fittings which may need to be fabricated due to field situations shall conform to the requirements of this specification.


3.1 SPECIAL WASTE PIPE AND FITTINGS (For Return Air Plenum/High Temperature - Installation)

  1. Pipe and fittings shall be installed according to current Fuseal 25/50™ installation instructions as delivered in print or found online at www.gfpiping.com. An on-site installation seminar shall be conducted by GF Piping Systems personnel who are certified to conduct said installation seminars. Seminar shall include all aspects of product installation (storage, set-up, support spacing, fusion procedure, transition fitting installation procedure, product testing procedures, etc.). At the conclusion of the installation seminar, all installers will be given a certification test and, upon successful completion of said test, will be issued a certification card verifying they have met the requirements of the factory with regards to proper product installation methods thereby meeting the intent of this specification.

  2. Only the GF Piping Systems fusion units MSA 250SE or “Electro Plus” may be used in the installation of the Fuseal 25/50™ piping system. GF Piping Systems personnel shall also conduct an on-site installation seminar with certification test for all installers using these fusion units. Under this specification, the contractor shall be responsible for purchasing either one MSA 250SE or one “Electro Plus” fusion unit for use in installation of the product on-site.


  1. The system shall be tested in accordance with all local plumbing/mechanical codes having jurisdiction in the territory where the installation is to take place. All sections of the fused piping system shall be tested with a maximum of a 30 foot head of water (approx. 15 PSI). Under no circumstances should the system be tested with air or any other gas. Joint may be pressure tested 10 minutes after the fusion cycle is completed.

Part Numbers / Dimensions