Asc 390013571 Gruvlok 8 Inch Rigidlok Grooved Coupling

Product Description

The ASC Engineered Solutions 390013571 is an 8-inch RigidLok grooved painted coupling designed to create rigid, load-bearing pipe joints in grooved piping systems. Constructed from ductile iron and finished with a painted exterior, this coupling delivers the structural integrity required for high-demand mechanical, fire protection, and HVAC piping installations. At 14.97 pounds, it is sized for 8-inch pipe and conforms to standard grooved-end pipe dimensions. Pipefitters and mechanical contractors install this coupling where rigid joint performance is needed to limit angular deflection and axial movement at the connection point.

This coupling is suited for commercial and industrial piping systems where grooved-end pipe joining methods are specified. Typical applications include HVAC chilled water and condenser water mains, fire suppression distribution mains, and industrial process piping. The rigid joint design makes it the correct choice when system layouts require a fixed, braced connection rather than a flexible joint. It is intended for use on 8-inch grooved-end pipe prepared to standard cut or roll groove specifications.

Key Features

• Rigid joint design restricts angular deflection and axial movement for fixed-pipe configurations
• Ductile iron construction provides high tensile strength for demanding mechanical piping systems
• Painted exterior finish provides corrosion resistance during storage and service
• 8-inch nominal size fits standard grooved-end pipe prepared to cut or roll groove dimensions
• Grooved coupling method enables faster assembly compared to welded or flanged alternatives

Compatibility

Designed as an OEM-style grooved coupling for use with standard 8-inch grooved-end pipe in rigid-joint mechanical piping systems.

Installation Notes

Installation should be performed by a licensed pipefitter or qualified mechanical contractor. Depressurize and drain the piping system completely before disassembling or installing any grooved coupling. Verify that pipe ends are prepared to the correct groove profile and dimensions before assembly, and inspect the gasket seating surface for damage. Follow applicable mechanical codes, including NFPA 13 for fire protection systems where relevant, and the manufacturer's torque specifications for fastener tightening.

Technical Specifications

• Fitting Size: 8 inches
• Fitting Material: Ductile Iron
• Finish: Painted
• Item Weight: 14.97 pounds

Standard Information

• Brand: ASC Engineered Solutions
• Manufacturer Part Number: 390013571