90° connector between rectangular duct 220x90mm and D150 mm pipe | 922SK15KP

The 922SK15KP is a 90° duct adapter that connects a 220×90 mm rectangular (flat) ventilation duct to a Ø150 mm round duct or pipe. It is the standard transition piece used wherever a flat duct run needs to switch to a round spigot — for example when connecting to a fan, a heat-recovery unit, a silencer, or an existing round duct system.

Made from durable white plastic, the round outlet has a plain spigot end sized for a direct push-fit into a Ø150 mm round duct of the same diameter; the rectangular end mates with standard 220×90 mm flat duct fittings. For a fully airtight joint we recommend sealing the connection with aluminium duct tape.