Anvil 390009520 Grooved Flexible Reducing Coupling 6x4 in

Product Description

The ANVIL 390009520 is a Fig. 7010 Grooved Flexible Reducing Coupling designed to directly connect two different pipe sizes in a single fitting. It ships with a purpose-built reducing gasket that features a center rib, which positions the gasket correctly and prevents the smaller pipe from telescoping into the larger pipe during assembly. Rated for working pressures up to 500 psi, this coupling is suited for a wide range of piping systems where a straight reducing connection is needed without stacking two standard couplings and a separate reducing fitting. Licensed plumbers and pipefitters are the primary installers.

This coupling is intended for grooved-end piping systems in commercial and industrial applications, including HVAC hydronic systems, fire protection piping, and general fluid distribution. The 6 inches by 4 inches size accommodates a direct transition between those two common pipe diameters. The flexible coupling design allows for minor angular deflection and linear movement, making it appropriate for systems where thermal expansion or vibration isolation is a consideration. It is not recommended for vacuum service.

Key Features

• Direct pipe-size reduction in a single grooved coupling, eliminating the need for two couplings and a separate reducing fitting
• Center-rib reducing gasket ensures proper seating and prevents smaller pipe from telescoping into the larger pipe
• Working pressure rating up to 500 psi
• Flexible coupling design accommodates minor angular deflection and linear movement
• Not recommended for vacuum applications

Compatibility

Designed as an OEM-style grooved fitting for use with standard grooved-end pipe in 6 inches and 4 inches diameters per AWWA and ANSI grooving specifications.

Installation Notes

Installation is typically performed by a licensed plumber or pipefitter following the grooving specifications of the pipe manufacturer and applicable mechanical codes. Depressurize and drain the line completely before removing any existing fittings or installing this coupling. Lubricate the gasket with an approved lubricant and confirm the center rib is properly seated over the pipe-size transition before tightening the coupling housing bolts evenly. Do not use this coupling on vacuum lines.

Technical Specifications

• Figure Number: 7010
• Connection Size: 6 inches x 4 inches
• Working Pressure: 500 psi maximum
• Coupling Type: Flexible Reducing
• End Connection: Grooved
• Includes Gasket: Yes, center-rib reducing gasket
• Vacuum Service: Not recommended

Standard Information

• Brand: ANVIL
• Manufacturer Part Number: 390009520