The Bernardo DC 300 / DC 400 Y-Junction is a branch fitting designed for Bernardo dust extraction systems, with a Ø 130 mm main inlet and a double Ø 100 mm × 2 outlet. Constructed from durable, corrosion-resistant material, it is compatible with Bernardo DC 300, DC 400 dust collectors and similar models with a Ø 130 mm main connection. It allows two suction lines to be connected to a single dust collector, evenly distributing airflow and reducing pressure losses. Quick installation with standard sleeves or hose clamps. Manufactured in Austria, distributed in Italy by Krollit as the official Bernardo distributor since 2007.
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Fitting type: Y-branch
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Inlet diameter: Ø 130 mm
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Outlet diameters: 2 × Ø 100 mm
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Material: Durable plastic / technical aluminum
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Compatibility: Bernardo DC 300, DC 400 dust collectors and similar models with Ø 130 mm main connection
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Origin: Austria
Who uses the DC 300/400 Y-Junction and for what
The Bernardo DC 300 / DC 400 Y-Junction is an accessory for dust extraction systems that allows two Ø 100 mm suction hoses to be connected to a single Ø 130 mm main duct. Typical application: a main machine (e.g., panel saw) requires robust Ø 130 mm extraction, but there are two other secondary machines in the workshop (e.g., miter saw + drill press), each with a Ø 100 mm outlet. The Y-junction combines the two Ø 100 outlets into a single Ø 130 flow that can be connected directly to the dust collector. In Krollit customer workshops, the Y-junction is chosen by carpentry shops with multiple machines simultaneously active, workshops that want to optimize the use of a single high-capacity dust collector, and workshops that are expanding their existing dust extraction system. Compatible with Bernardo DC 300 and DC 400 dust collectors and standard Bernardo flexible hoses.
Its place in the Bernardo range
The DC 300/400 Y-Junction is part of the Bernardo dust collector accessory range. The DC range is organized into 3 families: compact (DC 180, DC 250 CF) for small/hobby workshops; medium (DC 350 CF, DC 450 CF, DC 550 CF) for professional craft workshops; industrial (DC 650 CF, DC 750 CF, DC 850 CF) for carpentry shops and production departments. The Y-Junction is specifically compatible with DC 300 and DC 400 and similar accessories with a Ø 130 mm connection. For other models with different connections (Ø 100, Ø 150, Ø 180), dedicated junctions are available. For expanding the dust extraction system, also consider flexible hoses, hose clamps, transition sleeves between different diameters, all available in the Bernardo accessories catalog.
Krollit logistics and support
Bernardo shipping in 5-9 working days (7 days to the South). Lightweight accessory shipped in a single package. Original Bernardo sleeves, hose clamps, flexible hoses and complementary accessories available from stock with 3-5 working day shipping. Customer support available in Italian.
Who the DC 300/400 Y-Junction is for
| Profile |
Compatibility |
Reason |
| Passionate hobbyist with a small system |
Suitable |
Allows connecting 2 compact machines (e.g., miter saw + circular saw) to a dust collector with a Ø 130 mm outlet. Sufficient for occasional hobby use. |
| Carpentry shop with multiple machines simultaneously |
Recommended |
Distributes the flow of a single high-capacity dust collector across 2 parallel Ø 100 mm lines. Reduces pressure losses by 30-40% compared to using only one side of the main connection. |
| Workshop expanding its system |
Recommended |
Allows adding a second workstation without purchasing a second dust collector. Compatible with most standard Bernardo flexible hoses. |
Not suitable for: dust collectors with connections other than Ø 130 mm inlet or Ø 100 mm outlet (check compatibility before purchase); applications requiring 3-way or more branch junctions (dedicated accessories are needed); installations requiring rigid metal piping (the junction is sized for flexible hoses and standard sleeves).
Fitting specifications
| Specification |
Value |
| Fitting type |
Y-branch |
| Inlet diameter |
Ø 130 mm |
| Outlet diameters |
2 × Ø 100 mm |
| Material |
Durable plastic / technical aluminum |
Compatibility and application
| Specification |
Value |
| Compatible models |
Bernardo DC 300, DC 400 dust collectors and similar models with Ø 130 mm main connection |
| Application |
Industrial and woodworking dust extraction systems |
| Installation |
Quick with sleeves or hose clamps |
| Origin |
Austria |
Compliance
| Specification |
Value |
| Marking |
CE |
Standard equipment
- Y-Junction Ø 130 mm → 2 × Ø 100 mm for Bernardo DC 300 / DC 400 dust collectors
- User manual with assembly instructions
Frequently Asked Questions
Which Bernardo dust collectors are compatible with this Y-junction?
Bernardo DC 300, DC 400 dust collectors and other dust collectors with a Ø 130 mm main connection. Check the connection diameter before purchasing: the junction is sized for Ø 130 mm inlet.
For dust collectors with different connections (Ø 100, Ø 150, Ø 180), dedicated junctions are available. For dust collectors with a Ø 100 mm connection, the 1 × 100 → 2 × 80 mm junction is the correct choice. For industrial dust collectors with Ø 180 mm, consider 4-way junctions (1 × 180 → 4 × 100 mm) typically supplied with DC 650/750/850 CF.
Does the junction reduce the airflow of the dust collector?
Yes, slightly. When only one of the 2 outlets is in use (the other closed), the flow on that line is approximately 80-90% of the nominal flow of the dust collector. When both outlets are active, each delivers approximately 50% of the total flow.
The pressure loss through a well-sized Y-junction is typically 50-100 Pa, modest compared to flexible hose losses (200-400 Pa for every 5 m). For complex systems, it is recommended to check the flow balance between the lines, possibly with a differential manometer.
Can I connect the junction to rigid metal pipes?
Not directly. The junction is sized for flexible hoses and standard Ø 100 and Ø 130 mm sleeves. For connection to rigid pipes, dedicated fittings and transition sleeves are required.
Dust extraction systems with rigid piping are typical of professional carpentry shops with fixed installations. In such cases, welded metal junctions are recommended, not plastic. The DC 300/400 Y-Junction is sized for mixed or flexible systems typical of craft workshops and evolving workshops.
Are hose clamps included?
No. The junction is supplied without clamps: separate purchase of Ø 100 and Ø 130 mm hose clamps is required. Available in the Bernardo accessories catalog.
Standard clamps for woodworking dust extraction are made of stainless steel or galvanized steel with screw tightening. Available in all standard diameters. To ensure a long-term seal, it is recommended to tighten the clamps carefully, avoiding excessive tightening to prevent deformation of the sleeves.
Is the junction compatible with DC 350/450/550 CF?
Check the main connection of the specific dust collectors. The junction is sized for Ø 130 mm inlet. Dust collectors with a different connection require dedicated junctions or transition adapters.
For the newer DC series (350 CF, 450 CF), the main connection is 1 × 130 mm: the 130 → 2 × 100 mm junction is fully compatible. For industrial DC series (650/750/850 CF), the main connection is 1 × 180 mm: a dedicated junction supplied as standard with those models is required.
