Aquatherm 9790000000 Polypropylene Coated Flange Ring 2 in

Product Description

The AQUATHERM 9790000000 is a polypropylene overmolded flange ring, also known as a backing ring, designed for use in flanged piping connections. It features a steel insert encapsulated in an overmolded polypropylene shell, delivering significantly improved corrosion resistance compared to traditional powder-coated steel flange rings. The overmolding process results in a slightly thicker ring profile, which maintains the structural strength and rigidity of the internal steel insert. This part is sized for 2-inch pipe and is light gray in color, consistent with AQUATHERM flange ring sizing conventions for sizes up to 12 inches.

This flange ring is intended for use in plumbing and hydronic piping systems where flanged connections are required, particularly in harsh or corrosive environments where standard powder-coated steel backing rings would be prone to corrosion failure. It is suited for commercial and industrial installations involving polypropylene piping systems. Licensed plumbers and pipefitters working on corrosive service lines, chemical handling systems, or high-humidity mechanical rooms will find this part a direct upgrade over the legacy steel flange ring design. Compatible AQUATHERM bolt kits and bolt length charts have been updated to accommodate the slightly thicker profile of this ring.

Key Features

• Polypropylene overmold over steel insert for superior corrosion resistance versus powder-coated steel
• Slightly thicker profile than legacy rings due to overmolding process, while maintaining strength and rigidity
• Light gray color finish standard for pipe sizes up to 12 inches
• Compatible with existing AQUATHERM bolt kits, though updated kits with longer bolts are recommended for full thread engagement
• Designed as a direct transition replacement for powder-coated steel backing rings in flanged connections

Compatibility

Designed for use with AQUATHERM flanged piping systems at the 2-inch pipe size. Updated AQUATHERM bolt kits are recommended for optimal thread engagement with this overmolded ring; existing bolt kits are also compatible but may result in fewer exposed threads once installed.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable IPC and local plumbing code requirements. Depressurize and drain the system fully before disassembling any flanged connection. When using existing bolt kits with this ring, verify that adequate thread engagement is achieved at the nut; refer to the updated AQUATHERM bolt length chart for guidance on bolt selection. Do not over-torque flange bolts, and follow a cross-pattern tightening sequence to ensure even gasket seating.