This tough ABS moulded hose reducer/adaptor is just over 110mm tall. The large end is a 50mm long and 100mm o/d to take a 100mm extraction hose. The reducer tapers to a 30mm long x 63mm o/d spigot for 63mm hose.
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The adaptor fits exactly inside my 63mm flexible duct and 100mm solid duct, with a useful taper between the two to ease the airflow with minimum turbulence and therefore minimum noise.
One odd application I have used a couple of pairs of these in was to fabricate silencers for some 63mm ventilator ducting. The adaptors allowed me to introduce some 100mm duct cut to fit and lined with sound absorbent material protected by an inner pipe fabricated from a rolled perforated sheet, just like on a car exhaust, with the inner pipe located by the tapers on the end adaptors. See the picture.
As usual I secured the ducts to the adaptor with some duct tape to prevent them creeping apart.
5.0 out of 5 stars
Perfect fit inside 63mm and 100mm standard ducts
Reviewed in the United Kingdom on 5 December 2019
The adaptor fits exactly inside my 63mm flexible duct and 100mm solid duct, with a useful taper between the two to ease the airflow with minimum turbulence and therefore minimum noise.
One odd application I have used a couple of pairs of these in was to fabricate silencers for some 63mm ventilator ducting. The adaptors allowed me to introduce some 100mm duct cut to fit and lined with sound absorbent material protected by an inner pipe fabricated from a rolled perforated sheet, just like on a car exhaust, with the inner pipe located by the tapers on the end adaptors. See the picture.
As usual I secured the ducts to the adaptor with some duct tape to prevent them creeping apart.