Round Reducers

Round plastic reducers step a ducting run from one diameter to another — connecting a fan with a larger spigot to smaller duct, or matching new ducting to an existing run. Each reducer push-fits into standard round plastic ducting and fittings, keeping the joint neat and airtight.

We stock the following size steps:

125mm – 100mm

150mm – 100mm and 150mm – 125mm

Keep in mind that reducing duct diameter increases air velocity and resistance, so where possible run the larger size for as much of the route as you can and reduce close to the terminal. Pair with couplers and bends to complete the run. Stocked items ordered by 3pm ship next day.