OPW 3″ Double-Wall Coupling

Double-wall swivel couplings eliminate the need for cutting back the secondary jacket and rubber test boots. They have an integral interstitial access port for connector and test tubes. These double-wall couplings permit higher interstitial testing pressures and eliminate added parts and labor costs.

Double-wall pipe couplings require the use of an OPW Retail Fueling coupling machine to internally expand the stainless steel fitting onto the end of a FlexWorks pipe section. Internally expanded couplings have a long, successful history of reliable performance.

• Crush and puncture-resistant
• Semi-smooth liner facilitates ease of installation
• Saves you time and money
• No buried joints

• UL / ULC listed for use with Flex piping
• Quick, easy to install
• All stainless steel couplings
• Internally expanded couplings
• Permanent Interstitial Test Port

3″ Double Wall Coupling

• Fully compatible with our 3″ FlexWorks Piping
• Interstice integrated with the pipe secondary