All fittings can be manufactured with:
• Double Wall E-Z Flange Jr. with Barrel Clamp 6” to 24” Diameter
• Double Wall E-Z Flange with Barrel Clamp 26” to 96” Diameter
• Double Wall Couplings
Double Wall Standard Spiral Pipe Connector
Pipe to Pipe connections are made by using a double wall fitting size coupling that slips inside the mating pipe sections, as shown. A stop bead runs around the middle
of the coupling to center the coupling in the connection. Secure the connections by installing sheet metal screws through the outer shell of the duct, 1/2” from the stop bead.