Poly-Alloy Crimp Insert Fittings
Price List
Tech Data Sheet
Fittings are marked with F 877 and/or F 2159 ASTM Standards and the NSF-pw mark indicating third party certification by NSF International. NSF conducts random on-site inspections of the manufacturing facilities and independently tests PAL insert fittings for compliance with performance and toxicological standards.
Poly-Alloy fittings are made from a blend (alloy) of virgin polyphenylsulfone specialty polymer compounds possessing high temperature, high pressure and highly chemical-resistant properties. This process makes Poly-Alloy fittings ideally suited for hot and cold potable water applications. Poly-Alloy insert fittings are designed to be compliant with CANPEX™ series tubing in sizes 3/8" to 1", providing a corrosion-resistant water distribution system.

Tested in plumbing applications in North America for many years, Poly-Alloy insert fittings have proven to be both durable and reliable year after year. In areas where metallic pipe or fittings are attacked by hard or acidic water, corrosion or electrolysis, Poly-Alloy insert fittings are ideal. Rigorously tested, both internally and by a third party, Seymour’s Poly-Alloy fittings provide a clean and NSF certified system to standard 61 for health effects and performance.

Poly-Alloy insert fittings have many features not offered by the brass alternative, including:
  • Corrosion and chemical damage resistant
  • Electrolysis resistant
  • High-impact resistant
Seymour’s Poly-Alloy insert fittings provide a totally plastic distribution system proven to be durable, dependable and corrosion resistant for your most demanding potable water applications.

Does chlorine in drinking water, negatively affect the performance of Poly-Alloy fittings?
Chlorine levels commonly found in potable water are less than two parts per million. Seymour’s Poly-Alloy fittings have been tested in water with over 5 ppm of chlorine without any significant effects on the performance of the fittings.

Do any other chemicals have a negative effect on the performance of Poly-Alloy fittings?
Like any fitting, metallic or plastic, there are certain chemicals that negatively affect Poly-Alloy fittings. A chemical compatibility chart is available from Seymour to help you determine if the fittings are appropriate for your application. Compared to most fitting materials, however, Poly-Alloy fittings are highly resistant to damage from most common household chemicals and the polymer family from which the fittings are produced has proven its durability in thousands of manufactured homes across the country. As stated historically with plastic parts, pipe dope or other lubricants are not necessary for effective joining and should be avoided.

Do Poly-Alloy fittings require special installation practices compared to brass or copper fittings?
No, Poly-Alloy fittings can and should be installed using the same installation practices currently applied to CTS metallic PEX insert fittings, including metallic fittings designed for CTS SDR9 PEX. Poly-Alloy fittings are durable, highly impact resistant and are designed for the conditions existing in typical site-built construction and crimp installations.

Will the torque from the PEX crimp tool crush the Poly-Alloy fittings?
No, the PEX crimping tools are designed to compress the copper crimp ring to a specified size and not to “overcrimp” the fitting. The tool will only compress the ring to that level then stops, preventing overcompression of the ring or pipe onto the fitting. Additionally, Poly-Alloy fittings are designed not to shatter even when strong force is applied to them such as a hammer or tool hitting them with great force.

Poly-Alloy insert fittings should not be exposed to direct sunlight for more than 60 days.