PosiGrip Adapter – Model 7390/8390
Product Overview
The Model 7390/8390 PosiGrip Adapter is a versatile, high-strength coupling solution designed to securely join flanged fittings, valves, and equipment to plain-end HDPE, PVC, or ductile iron pipes. Engineered for strength and reliability, the PosiGrip system eliminates the need for welding, grooving, or threading — providing a fast, leak-free, and durable connection.
Constructed from ductile iron ASTM A536 Grade 65-45-12, the PosiGrip Adapter delivers superior mechanical strength and performance under working pressures up to 250 PSI. It’s the ideal choice for waterworks, industrial, and municipal piping systems that demand easy installation and long-lasting reliability.
Key Features
-
Universal Connection Method:
-
- Joins flanged fittings, valves, and equipment with integral flanges to plain-end HDPE, PVC, or ductile iron pipes.
-
- Suitable for new installations, repairs, or retrofits across multiple piping materials.
-
High-Strength Construction:
-
- Made of ductile iron ASTM A536, Grade 65-45-12 for high tensile and yield strength.
-
- Delivers dependable sealing and alignment without welding or special pipe preparation.
-
Standards Compliance:
-
Working Pressure: Rated to 250 PSI for both DI (7390 Series) and IPS (8390 Series) pipe sizes.
-
Corrosion-Resistant Coating: Factory-applied protective finish ensures long-term performance in harsh service environments.
-
Quick and Secure Installation: Reduces downtime and labor with a simplified joining process that provides a permanent, watertight connection.
Applications
-
Municipal and Waterworks Systems
-
Fire Protection Networks
-
Industrial and Utility Pipelines
-
HDPE and PVC Pipe Connections
-
Retrofit and Repair Installations
Why Choose the PosiGrip Adapter – Model 7390/8390
The PosiGrip Adapter – Model 7390/8390 offers unmatched flexibility and reliability for joining dissimilar piping systems. Its high-strength ductile iron construction, ANSI-compliant flange drilling, and 250 PSI pressure rating make it a trusted solution for contractors, engineers, and utilities. Designed for performance and simplicity, the PosiGrip Adapter ensures a secure, long-lasting connection with minimal installation effort.
How it Works
PosiGrip is a method of joining flanged fittings, flanged valves, and other equipment with integral flanged ends to plain-ended, HDPE pipes and PVC pipes, with all the advantages to ductile iron and steel pipes with welded, grooved, or screwed systems.Slide the flange and gasket over the plain-ended pipe so that the end of the pipe and flange are in line. When the PosiGrip is brought to mate against the existing flange, and the flange bolts are tightened, it creates a compression seal against the mating flange and down on the pipe surface.
