PPro-Seal™ Natural PP


PPro-Seal™ Natural PP has excellent resistance to attack by most organic and inorganic chemicals in common use. In general, PPro-Seal™ is attacked only by strong oxidizing acids and is weakened by certain organic solvents and chlorinated hydrocarbons. Like all thermoplastic products, PPro-Seal™ will not rust, pit, scale or corrode. PPro-Seal™ is not subject to electrolysis, providing years of maintenance-free, leak-free service.

PPro-Seal™ Natural PP is a highly pure product ideal for use in piping systems where purity is not only required, but is essential.

Natural Polypropylene's (PPn) chemical and physical properties make it ideal for laboratory and industrial piping where mixtures of acids, bases, and solvents are involved.

PPro-Seal is fast and easy to install; options include electrofusion and threaded connections.

Product Overview

Technical Data:

Size Range:

  • ½" - 3"

Pressure Rating:

  • PN10 (150 PSI)

Operating Temperature:

  • 0°C - 80°C (32°F - 176°F)

Joining Technology:

  • Electrofusion
  • Threaded

Standard Ratings:

  • FDA CFR 21 177.1520
  • ASTM D4101
  • ASTM F1290
  • USP 25 Class VI


  • Polypropylene copolymer (PPn)

Fields of Application:

  • Lab Grade DI Water
  • Reverse Osmosis Systems
  • Life Sciences
  • Chemical Process Industry
  • Food and Beverage


  • Excellent chemical and corrosion resistance
  • Impact-resistant
  • Simple installation procedure
  • Electrofusion and threaded fittings offering
  • Low installation costs
  • Easy to operate electrofusion machines


PPro-Seal™ Natural (PP-R) Specification



  1. Polypropylene Pipe shall be manufactured from natural virgin copolymer polypropylene material with no added plasticizers, pigments or re-grind, manufactured to Sch. 80 dimensions with a pressure rating of 150 psi when measured at 68°F (20°C). Pipe shall be capable of conveying fluids up to 176°F (80°C). Pipe shall be manufactured in sizes from ½” through 3”.

  2. Polypropylene Fittings shall be manufactured from natural virgin copolymer polypropylene material with no added plasticizers, pigments or re-grind, manufactured to Sch. 80 dimensions with a pressure rating of 150 psi when measured at 63°F (20°C). Fittings shall be capable of handling fluids up to 176°F (80°C). Fittings shall be produced in sizes from ½” up to 3”. Fittings shall be manufactured and catalogued for coil fusion joining method.

  3. All components of the pipe and fitting system shall conform to the following applicable ASTM Standards, D4101, D638, D1785, F1290, and shall conform to FDA CFR 21 177.1520 Sections A1, B and C. All pipes shall be marked with manufacturers name, product name, ASTM listing, size, schedule and material type. Fittings shall be legibly marked with molded letters showing manufacturers’ trademark, pipe size of each socket, product name, ASTM listing, USA and symbol PP indicating the material type.

  4. Each fusion coil shall consist of a polypropylene jacketed wire, mandrel wound, heat fused on the outer surface. The wire is inserted into the socket at the factory and is designed to have a snug fit. Wire leads from the coil shall be terminated via a duplex receptacle for attachment to the fusion unit cable. When required fittings shall be supplied with IPS threaded connections (up to 2” only). NOTE: Threaded fittings are not recommended for installation in a pressure system).

  5. System components shall be packaged in polybags at the point of manufacturing to ensure product cleanliness.

  6. Shall be PPro-Seal™ Natural PP Piping System as manufactured by GF Piping Systems.


  1. Ball Valves: Ball valves shall be floating ball design with full-port true union end constructed of natural virgin copolymer polypropylene with no added plasticizers, pigments or re-grind. All ”O” rings shall be FPM and the valve seats shall be PTFE, manufactured for installation in PPro-Seal™ Natural PP Piping System, Type 375 as manufactured by GF Piping Systems. Valve shall have a pressure rating of 150 psi at 68°F.

  2. Diaphragm Valves: Diaphragm valves upper body shall be glass filled polypropylene material connected to lower body with exposed stainless steel bolts. Lower bodies shall be natural virgin polypropylene with no plasticizers, pigments or re-grind. Diaphragms shall be fabricated of EPDM material with EPDM elastomer backing, manufactured for installation in PPro-Seal™ Natural PP Piping system, Type 315, as manufactured by GF Piping Systems. Valve shall have a pressure rating of 150 psi at 68°F.



  1. Material shall be stored in original packaging and protected from environmental damage until installation. Pipe shall be supported sufficiently to prevent sagging. Care shall be taken not to gouge or otherwise notch the pipe in excess of 10% of the wall thickness.


  1. Pipe and fittings shall be installed according to current PPro-Seal™ 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 seminar. Seminar topics shall include all aspects of product installation (storage, set-up, support spacing, fusion procedure, threaded joint 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 the 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 the specifications. 

  2. Only the following GF Piping Systems fusion units MSA-250SE or “Electro Plus” may be used to install the PPro-Seal™ Natural PP 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 section, the contractor shall purchase either an MSA-250SE or an “Electro Plus” fusion unit to be used in the installation of the pipe and fitting system. At the completion of the installation and testing of the system, the contractor shall turn over the fusion unit to the facility personnel for their use in future system upgrades.

  3. Installer shall ensure that all pipe and fittings used for Pure Water Piping are components of the same system. No mixing of various manufacturers’ pipe and or fittings shall be allowed.


The system shall be tested in accordance with the manufacturers’ recommendations.

Following is a general test procedure for Georg Fischer plastic piping. It applies to most applications. Certain applications may require additional consideration. For further questions regarding your application, please contact your local GF representative.

  1. All piping systems should be pressure tested prior to being placed into operational service.

  2. All pressure tests should be conducted in accordance with the appropriate building, plumbing, mechanical and safety codes for the area where the piping is being installed.

  3. When testing plastic piping systems, all tests should be conducted hydrostatically and should not exceed the pressure rating of the lowest rated component in the piping system (often a valve). Test the system at 150% of the designed operational pressure, i.e.: If the system is designed to operate at 80PSI, then the test will be conducted at 120PSI.

    This should be done in four stages, waiting ten minutes at each stage (adding 1/4 the total desired pressure at each stage).

Part Numbers / Dimensions