Reducing Male Connector for PU Polyurethane Ducting

3D Printed ABS Plastic Thick Walled

PUDR065050K-ASH

£7.50

Not for high pressure or heat

Not suitable for high-pressure or high-temperature applications, such as turbo or radiator systems.

Delivery/Collection

Collect from Silicone Hose UK

Orders can be collected once you receive your ready-to-collect email.

Address

Silicone Hose UK

HolmeBank Business Park, Station Road
Unit 5
Mirfield WF14 8NA
United Kingdom

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Opening hours

Monday	07:00 – 19:00
Tuesday	07:00 – 19:00
Wednesday	07:00 – 18:00
Thursday	07:00 – 18:00
Friday	07:00 – 17:00
Saturday	07:00 – 13:00
Sunday	Closed

Bank holidays may affect our opening hours and delivery times.

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Reducing Male Connector for PU Polyurethane Ducting is a robust and practical fitting designed to join polyurethane ducting of two different diameters securely. Manufactured from high-strength ABS plastic, the connector provides excellent resistance to impact, wear, and a wide range of environmental conditions. The stepped reducing design allows for straightforward size transitions between ducting runs, while the ribbed male profile ensures a tight, reliable grip inside the ducting wall. This connector is lightweight, non-corrosive, and easy to install, making it ideal for use in dust extraction, woodworking machinery, agricultural ventilation, and general industrial ducting systems where dependable airflow management and durability are required.

Key Features:

Material: ABS plastic for toughness, impact resistance, and long service life.
Design: Reducing stepped male connector for joining different duct sizes.
Profile: Ribbed male fitting ensures secure push-fit inside polyurethane ducting.
Function: Provides a smooth transition between ducting diameters to maintain airflow efficiency.
Finish: Non-corrosive, lightweight, and resistant to moisture and chemicals.
Operating Temperature: -40°C to +90°C, suitable for use in standard dust, fume, and air movement systems.
Applications: Dust extraction, woodworking, agricultural ventilation, industrial ducting, and fume control.

The durable ABS construction ensures strength and reliability while remaining easy to handle and install. Its reducing male profile allows ducting systems of varying diameters to be joined without compromising flow performance. The ribbed grip prevents slippage under airflow or vibration, maintaining secure system integrity. Resistant to wear, moisture, and many industrial chemicals, the connector is well suited to heavy-duty use in workshops, factories, and agricultural facilities. Its lightweight, push-fit design reduces installation time and simplifies maintenance or modifications to ducting systems.

Typical applications include reducing connections on woodworking extraction lines, linking flexible polyurethane ducting to fixed pipework, agricultural ventilation systems, dust and fume control equipment, and general air movement setups. The Reducing Male Connector for PU Polyurethane Ducting provides an effective and durable solution for adapting different ducting sizes while maintaining secure and efficient airflow management.

Size Guide

Outside Diameter Largemm	Outside Diameter Smallmm
65	50
80	50
80	65
100	50
100	65
100	80
125	80
125	50
125	65
125	100
150	50
150	65
150	100
150	125
200	50
200	65
200	80
200	100
200	125
200	150

Measurements are nominal and may vary slightly.

How to measure OD

1

Measure across the outside

Rigid pipe, tube and joiners are sized by the outer wall, because that is the surface a hose seals against. The bore and wall thickness follow from it — they are not the ordering size.

2

Use vernier calipers

Set the outer jaws across the widest point. A tape measure round a curve reads low by a millimetre or two — enough to buy the wrong size.

3

Take three readings, keep the largest

Rotate 60° between each. If they disagree the tube is oval; size to the biggest figure so the hose still clamps down evenly.

4

Match the hose to this OD

The hose sleeves over the tube, so the hose you want is the one whose internal diameter equals this outside diameter. A 51 mm tube takes a 51 mm ID hose.

Order by OD, always. Tube, rigid pipe and joiners are listed by outside diameter — the surface the hose clamps onto. Pair one with a hose of the same ID. On reducers, quote both ends, largest first.

Construction

Material

Acrylonitrile Butadiene Styrene (ABS)

Toughness, impact resistance, and long service life

Design

Reducing stepped male connector

Joining different duct sizes

Finish

Non-corrosive, lightweight, and resistant to moisture and chemicals

Suitable for use in standard dust, fume, and air movement systems · -40°C to +90°C

Ducting joiner. Clamp and go.

ABS spigot connectors for PU polyurethane ducting.

OUTSIDE DIAMETERS

50mm to 200mm

RATED

−40°C to +90°C

MATERIAL

ABS plastic

PRODUCTION

3D printed

COLOURS

Black, white, red or blue

Find your perfect colour

Moulded in colour the whole way through, so a scuff will not show a different colour underneath. The Reducing Male Connector for PU Polyurethane Ducting is the same part in all four colours — only the colour changes.

Black

White

Reducing Male Connector for PU Polyurethane Ducting – Red

Red

Blue

Colours shown are indicative — screen rendering varies.

Specification at a glance

Across the whole range.

65mm –200mm Outside diameter large

50mm –150mm Outside diameter small

59MPa Tensile strength

Outside diameter large (mm)	Outside diameter small (mm)
65	50
80	50
80	65
100	50
100	65
100	80
125	80
125	50
125	65
125	100
150	50
150	65
150	100
150	125
200	50
200	65
200	80
200	100
200	125
200	150

Show all 20 sizes → Show fewer

How it's built

What it's made of.

Made from acrylonitrile Butadiene Styrene (ABS).

1

Material

Acrylonitrile Butadiene Styrene (ABS)

Toughness, impact resistance, and long service life

2

Design

Reducing stepped male connector

Joining different duct sizes

3

Finish

Non-corrosive, lightweight, and resistant to moisture and chemicals

Suitable for use in standard dust, fume, and air movement systems-40°C to +90°C

Product gallery

Frequently Asked Questions.

Answers to the questions we’re asked most about sizing, fitment and performance.

Still can't find your answer?

Contact Us

What is it for?

Joining two runs of PU polyurethane ducting of different diameters, or stepping a duct down to a smaller machine spigot, in dust extraction, woodworking, agricultural ventilation and general industrial air handling.

What size pairings do you stock?

Stepped pairings from 65mm to 50mm up to 150mm to 125mm, including 80mm, 100mm and 125mm as the larger end. Order the large diameter first and the small one second, matching the bore of the ducting on each side.

What is it made from?

ABS plastic, 3D printed, chosen for toughness, impact resistance and a long service life. It is non-corroding and light, so it does not load the duct run.

How does it hold?

The ribbed male profile grips inside the duct wall, and a clamp over each side pulls it tight. No adhesive or sealant required, and it comes apart again when you reconfigure the run.

Will reducing the duct size cost me airflow?

Yes - every reduction raises resistance and drops flow, and the effect is larger than people expect. Never neck down below the fan or machine outlet diameter, and reduce as close to the end of the run as you can rather than at the start.

How do I fit it?

Push each duct fully onto its spigot, seat it past the ribs, and secure with a worm drive clip or ducting clamp. Support the duct either side so the connector is not carrying the run.