Multi-way Tube Splitter / Connector 3D models

First model: 2025-12-10

Number of 3D models generated: 121

Category: technical parts

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Photos of various 3D printed models

This template generates multi-way tube connectors, from simple 3-way connectors (also known as Y-connectors) up to 10-way connectors.

In addition to defining the outer and inner diameters, you can choose whether or not to add inner and/or outer fillets to make assembly easier.

Keywords: multi-way tube connector, multi-way tube fitting, multi-port tube connector, multi-branch tube connector, Y-connector, Y-fitting, tube splitter, tube manifold, multi-output tube connector

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	name	unit	Value	Weight
#1	number of ports 3 to 10 - integer
#2	outer diameter 3 to 300 – up to 1 decimal place	mm
#3	inner diameter 2.9 to 299.9 – up to 1 decimal place	mm
#4	end fillets		-	-
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Additional information

See 3d modeling details

The usable length of each branch, measured from the central hub to the end of the tube, is equal to the outer diameter × 1.2.

Illustration of the parameters

The latest online-generated models

Distribution manifold 3 tubes STL 3D model – Outer diameter 22 mm, wall thickness 1 mm (📦 #10148)

1 object(s) - format STL

STL 3D file of a ways distribution manifold with 3 ways, ready to download. The three branches are arranged evenly, with an angular step of 120° between each outlet. The branch sections accept tubes with an outer diameter of 22 mm and provide an internal passage of 20 mm. This part uses a very thin wall (1 mm). External fillets are added at the ends to make it easier to slip the connector into ducts or hoses. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	3
outer diameter	22	mm
inner diameter	20	mm
end fillets	outside

Star-pattern connector 4 tubes STL file – Outer diameter 8 mm, wall thickness 2 mm (📦 #9899)

1 object(s) - format STL

Download this STL 3D multi-way ways manifold model with 4 ways. The four branches are distributed symmetrically, with an angular step of 90° between each branch. The branch sections accept tubes with an outer diameter of 8 mm and provide an internal passage of 4 mm. The wall is thin, with a thickness of 2 mm. The internal edges at each branch end are softened with fillets to help guide the tube during assembly. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	4
outer diameter	8	mm
inner diameter	4	mm
end fillets	inside

Multi-ways connector 3 ways STL 3D file – Outer diameter 85 mm, wall thickness 2.5 mm (📦 #9877)

1 object(s) - format STL

Download this STL 3D hoses distribution manifold model with 3 hoses. This Y-style model provides 3 hoses, each separated by 120° for a balanced flow split. The branch sections accept tubes with an outer diameter of 85 mm and provide an internal passage of 80 mm. The wall thickness is 2.5 mm. The internal and external edges at each branch end are softened, which makes assembly more comfortable. This part could suit extraction systems, air-cooling setups, or any project where a flow has to be routed toward several outlets.

Parameter	Value	Unit
number of ports	3
outer diameter	85	mm
inner diameter	80	mm
end fillets	both

5 tubes connector STL 3D model – Outer diameter 50 mm, wall thickness 5 mm (📦 #9514)

1 object(s) - format STL

STL 3D file of a tubes distribution manifold with 5 tubes, ready to download. The branches are laid out in a star around the center, with 5 tubes and an angular step of 72°. Each branch is sized for tubes with an outer diameter of 50 mm and an inner diameter of 40 mm. This part features a thick wall of 5 mm. The external edges at each branch end are softened with fillets, which helps when inserting into an existing duct. This part could suit extraction systems, air-cooling setups, or any project where a flow has to be routed toward several outlets.

Parameter	Value	Unit
number of ports	5
outer diameter	50	mm
inner diameter	40	mm
end fillets	outside

3 ways fitting STL file – Outer diameter 36 mm, wall thickness 1.65 mm (📦 #9395)

1 object(s) - format STL

Download this STL 3D multi-ways connector model with 3 ways. The connector has a Y-shaped layout with 3 ways, spaced 120° apart around the center axis. The branch sections accept tubes with an outer diameter of 36 mm and provide an internal passage of 32.7 mm. The connector features a thin wall (1.65 mm). No end fillets are applied, so both the inner and outer edges remain sharp. This part could suit extraction systems, air-cooling setups, or any project where a flow has to be routed toward several outlets.

Parameter	Value	Unit
number of ports	3
outer diameter	36	mm
inner diameter	32.7	mm
end fillets	none

3 ways connector STL file – Outer diameter 5 mm, wall thickness 1 mm (📦 #9292)

1 object(s) - format STL

Download this STL 3D multi-ways connector model with 3 ways. The three branches are arranged evenly, with an angular step of 120° between each outlet. The connector is designed for tubes with a 5 mm outer diameter and a 3 mm inner diameter. The wall is very thin, with a thickness of 1 mm. The ends feature internal and external fillets, reducing sharp edges and making installation easier. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	3
outer diameter	5	mm
inner diameter	3	mm
end fillets	both

Multi-tubes connector 3 tubes STL 3D model – Outer diameter 10 mm, wall thickness 1 mm (📦 #9191)

1 object(s) - format STL

STL 3D file of a ways distribution manifold with 3 ways, ready to download. The three branches are arranged evenly, with an angular step of 120° between each outlet. The branch sections accept tubes with an outer diameter of 10 mm and provide an internal passage of 8 mm. A wall thickness of 1 mm corresponds to a very thin shell. The internal and external edges at each branch end are softened, which makes assembly more comfortable. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	3
outer diameter	10	mm
inner diameter	8	mm
end fillets	both

Star-pattern fitting 3 ways STL 3D model – Outer diameter 50 mm, wall thickness 2 mm (📦 #9177)

1 object(s) - format STL

Download this STL 3D multi-tubes connector model with 3 tubes. The connector has a Y-shaped layout with 3 tubes, spaced 120° apart around the center axis. The branch sections accept tubes with an outer diameter of 50 mm and provide an internal passage of 46 mm. This thickness (2 mm) corresponds to a thin wall. The external edges at each branch end are softened with fillets, which helps when inserting into an existing duct. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	3
outer diameter	50	mm
inner diameter	46	mm
end fillets	outside

Star-pattern fitting 3 ways STL file – Outer diameter 204 mm, wall thickness 2 mm (📦 #9104)

1 object(s) - format STL

STL 3D file of a multi-way ways manifold with 3 ways, ready to download. This Y-style model provides 3 ways, each separated by 120° for a balanced flow split. The connector is designed for tubes with a 204 mm outer diameter and a 200 mm inner diameter. The connector features a thin wall (2 mm). No end fillets are applied, so both the inner and outer edges remain sharp. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	3
outer diameter	204	mm
inner diameter	200	mm
end fillets	none

Multi-ways fitting 3 ways STL 3D model – Outer diameter 200 mm, wall thickness 2 mm (📦 #9089)

1 object(s) - format STL

STL 3D file of a ways distribution manifold with 3 ways, ready to download. The connector has a Y-shaped layout with 3 ways, spaced 120° apart around the center axis. The branch sections accept tubes with an outer diameter of 200 mm and provide an internal passage of 196 mm. This thickness (2 mm) corresponds to a thin wall. The internal edges at each branch end are softened with fillets to help guide the tube during assembly. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	3
outer diameter	200	mm
inner diameter	196	mm
end fillets	inside

Multi-ways fitting 3 ways STL 3D file – Outer diameter 25 mm, wall thickness 2.5 mm (📦 #9081)

1 object(s) - format STL

STL 3D file of a multi-way tubes manifold with 3 tubes, ready to download. The three branches are arranged evenly, with an angular step of 120° between each outlet. The connector is designed for tubes with a 25 mm outer diameter and a 20 mm inner diameter. The wall has a thickness of 2.5 mm. External end fillets improve engagement and reduce snagging on the outer edges. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	3
outer diameter	25	mm
inner diameter	20	mm
end fillets	outside

Multi-ways connector 3 ways STL file – Outer diameter 5 mm, wall thickness 1.05 mm (📦 #8843)

1 object(s) - format STL

This STL 3D multi-way hoses manifold with 3 hoses is available for download. The connector has a Y-shaped layout with 3 hoses, spaced 120° apart around the center axis. Each branch is sized for tubes with an outer diameter of 5 mm and an inner diameter of 2.9 mm. The wall is thin, with a thickness of 1.05 mm. The ends feature internal and external fillets, reducing sharp edges and making installation easier. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	3
outer diameter	5	mm
inner diameter	2.9	mm
end fillets	both

Multi-tubes fitting 4 tubes STL 3D file – Outer diameter 24 mm, wall thickness 1.5 mm (📦 #8696)

1 object(s) - format STL

Download this STL 3D hoses distribution manifold model with 4 hoses. The connector uses a cross-shaped layout, with 4 hoses set 90° from one another. Each branch is sized for tubes with an outer diameter of 24 mm and an inner diameter of 21 mm. The wall is thin, with a thickness of 1.5 mm. No end fillets are applied, so both the inner and outer edges remain sharp. This part could suit extraction systems, air-cooling setups, or any project where a flow has to be routed toward several outlets.

Parameter	Value	Unit
number of ports	4
outer diameter	24	mm
inner diameter	21	mm
end fillets	none

3 ways connector STL 3D model – Outer diameter 51 mm, wall thickness 3 mm (📦 #8687)

1 object(s) - format STL

Download this STL 3D multi-ways connector model with 3 ways. This Y-style model provides 3 ways, each separated by 120° for a balanced flow split. The branch sections accept tubes with an outer diameter of 51 mm and provide an internal passage of 45 mm. The wall thickness is 3 mm. The ends are left without fillets, with raw inner and outer edges. This part could suit extraction systems, air-cooling setups, or any project where a flow has to be routed toward several outlets.

Parameter	Value	Unit
number of ports	3
outer diameter	51	mm
inner diameter	45	mm
end fillets	none

Multi-tubes fitting 3 tubes STL 3D model – Outer diameter 8 mm, wall thickness 1 mm (📦 #8617)

1 object(s) - format STL

3D STL model of a multi-ways fitting with 3 ways, ready to use in your projects. The connector has a Y-shaped layout with 3 ways, spaced 120° apart around the center axis. The branch sections accept tubes with an outer diameter of 8 mm and provide an internal passage of 6 mm. This part uses a very thin wall (1 mm). The ends feature internal and external fillets, reducing sharp edges and making installation easier. This part could suit extraction systems, air-cooling setups, or any project where a flow has to be routed toward several outlets.

Parameter	Value	Unit
number of ports	3
outer diameter	8	mm
inner diameter	6	mm
end fillets	both

5 tubes manifold STL 3D model – Outer diameter 25 mm, wall thickness 1.5 mm (📦 #8612)

1 object(s) - format STL

Download this STL 3D multi-way ways manifold model with 5 ways. The branches are laid out in a star around the center, with 5 ways and an angular step of 72°. The branch sections accept tubes with an outer diameter of 25 mm and provide an internal passage of 22 mm. The connector features a thin wall (1.5 mm). Both internal and external fillets are applied at the ends to ease tube insertion and duct engagement. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	5
outer diameter	25	mm
inner diameter	22	mm
end fillets	both

Multi-ways fitting 4 ways STL 3D file – Outer diameter 24 mm, wall thickness 1.5 mm (📦 #8611)

1 object(s) - format STL

This STL 3D multi-way hoses manifold with 4 hoses is available for download. This cross-style model offers 4 hoses, spaced regularly by 90° around the center. The branch sections accept tubes with an outer diameter of 24 mm and provide an internal passage of 21 mm. The connector features a thin wall (1.5 mm). The internal and external edges at each branch end are softened, which makes assembly more comfortable. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	4
outer diameter	24	mm
inner diameter	21	mm
end fillets	both

4 ways connector STL 3D file – Outer diameter 100 mm, wall thickness 5 mm (📦 #8518)

1 object(s) - format STL

Download this STL 3D ways distribution manifold model with 4 ways. The connector uses a cross-shaped layout, with 4 ways set 90° from one another. The branch sections accept tubes with an outer diameter of 100 mm and provide an internal passage of 90 mm. The external edges at each branch end are softened with fillets, which helps when inserting into an existing duct. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	4
outer diameter	100	mm
inner diameter	90	mm
end fillets	outside

Star-pattern fitting 3 hoses STL 3D model – Outer diameter 80 mm, wall thickness 2 mm (📦 #8508)

1 object(s) - format STL

STL 3D file of a multi-way ways manifold with 3 ways, ready to download. The connector has a Y-shaped layout with 3 ways, spaced 120° apart around the center axis. The connector is designed for tubes with a 80 mm outer diameter and a 76 mm inner diameter. The connector features a thin wall (2 mm). The external edges at each branch end are softened with fillets, which helps when inserting into an existing duct. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	3
outer diameter	80	mm
inner diameter	76	mm
end fillets	outside

Distribution manifold 3 hoses STL file – Outer diameter 6.3 mm, wall thickness 1 mm (📦 #8471)

1 object(s) - format STL

3D STL model of a ways distribution manifold with 3 ways, ready to use in your projects. This Y-style model provides 3 ways, each separated by 120° for a balanced flow split. The branch sections accept tubes with an outer diameter of 6.3 mm and provide an internal passage of 4.3 mm. The wall is very thin, with a thickness of 1 mm. The ends feature internal and external fillets, reducing sharp edges and making installation easier. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	3
outer diameter	6.3	mm
inner diameter	4.3	mm
end fillets	both

3 tubes manifold STL 3D file – Outer diameter 6.3 mm, wall thickness 0.5 mm (📦 #8455)

1 object(s) - format STL

STL 3D file of a ways distribution manifold with 3 ways, ready to download. The three branches are arranged evenly, with an angular step of 120° between each outlet. The connector is designed for tubes with a 6.3 mm outer diameter and a 5.3 mm inner diameter. This part uses a very thin wall (0.5 mm). The ends are left without fillets, with raw inner and outer edges. This part could suit extraction systems, air-cooling setups, or any project where a flow has to be routed toward several outlets.

Parameter	Value	Unit
number of ports	3
outer diameter	6.3	mm
inner diameter	5.3	mm
end fillets	none

3 hoses manifold STL 3D file – Outer diameter 12.6 mm, wall thickness 1 mm (📦 #8454)

1 object(s) - format STL

Download this STL 3D multi-ways connector model with 3 ways. The three branches are arranged evenly, with an angular step of 120° between each outlet. The connector is designed for tubes with a 12.6 mm outer diameter and a 10.6 mm inner diameter. This part uses a very thin wall (1 mm). Both internal and external fillets are applied at the ends to ease tube insertion and duct engagement. This part could suit extraction systems, air-cooling setups, or any project where a flow has to be routed toward several outlets.

Parameter	Value	Unit
number of ports	3
outer diameter	12.6	mm
inner diameter	10.6	mm
end fillets	both

Star-pattern fitting 3 ways STL 3D file – Outer diameter 17.3 mm, wall thickness 1 mm (📦 #8450)

1 object(s) - format STL

This STL 3D ways distribution manifold with 3 ways is available for download. The three branches are arranged evenly, with an angular step of 120° between each outlet. Each branch is sized for tubes with an outer diameter of 17.3 mm and an inner diameter of 15.3 mm. A wall thickness of 1 mm corresponds to a very thin shell. External fillets are added at the ends to make it easier to slip the connector into ducts or hoses. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	3
outer diameter	17.3	mm
inner diameter	15.3	mm
end fillets	outside

3 tubes connector STL 3D file – Outer diameter 50 mm, wall thickness 2 mm (📦 #8436)

1 object(s) - format STL

3D STL model of a tubes distribution manifold with 3 tubes, ready to use in your projects. The connector has a Y-shaped layout with 3 tubes, spaced 120° apart around the center axis. Each branch is sized for tubes with an outer diameter of 50 mm and an inner diameter of 46 mm. This thickness (2 mm) corresponds to a thin wall. The ends are left without fillets, with raw inner and outer edges. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	3
outer diameter	50	mm
inner diameter	46	mm
end fillets	none

Star-pattern fitting 3 ways STL 3D model – Outer diameter 28 mm, wall thickness 2.5 mm (📦 #8301)

1 object(s) - format STL

This STL 3D multi-way ways manifold with 3 ways is available for download. This Y-style model provides 3 ways, each separated by 120° for a balanced flow split. The connector is designed for tubes with a 28 mm outer diameter and a 23 mm inner diameter. This model uses a wall of 2.5 mm. The ends are left without fillets, with raw inner and outer edges. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	3
outer diameter	28	mm
inner diameter	23	mm
end fillets	none

3 tubes manifold STL 3D model – Outer diameter 27 mm, wall thickness 2.5 mm (📦 #8295)

1 object(s) - format STL

STL 3D file of a multi-ways fitting with 3 ways, ready to download. The connector has a Y-shaped layout with 3 ways, spaced 120° apart around the center axis. Each branch is sized for tubes with an outer diameter of 27 mm and an inner diameter of 22 mm. This model uses a wall of 2.5 mm. No end fillets are applied, so both the inner and outer edges remain sharp. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	3
outer diameter	27	mm
inner diameter	22	mm
end fillets	none

Star-pattern connector 3 hoses STL 3D model – Outer diameter 9 mm, wall thickness 2.75 mm (📦 #8058)

1 object(s) - format STL

STL 3D file of a multi-way tubes manifold with 3 tubes, ready to download. This Y-style model provides 3 tubes, each separated by 120° for a balanced flow split. The connector is designed for tubes with a 9 mm outer diameter and a 3.5 mm inner diameter. This model uses a wall of 2.75 mm. The tube ends stay straight, with no internal or external fillets. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	3
outer diameter	9	mm
inner diameter	3.5	mm
end fillets	none

Multi-tubes fitting 5 tubes STL file – Outer diameter 17 mm, wall thickness 4.25 mm (📦 #8043)

1 object(s) - format STL

STL 3D file of a multi-tubes connector with 5 tubes, ready to download. The branches are laid out in a star around the center, with 5 tubes and an angular step of 72°. Each branch is sized for tubes with an outer diameter of 17 mm and an inner diameter of 8.5 mm. Internal fillets are added at the ends to make tube insertion easier and reduce snagging. The model could be adapted for custom installations, hose routing, or technical projects that need a compact distribution fitting.

Parameter	Value	Unit
number of ports	5
outer diameter	17	mm
inner diameter	8.5	mm
end fillets	inside

Star-pattern connector 4 ways STL 3D file – Outer diameter 90 mm, wall thickness 3 mm (📦 #7933)

1 object(s) - format STL

STL 3D file of a multi-ways fitting with 4 ways, ready to download. The connector uses a cross-shaped layout, with 4 ways set 90° from one another. The branch sections accept tubes with an outer diameter of 90 mm and provide an internal passage of 84 mm. The wall has a thickness of 3 mm. No end fillets are applied, so both the inner and outer edges remain sharp. This multi-way connector could be used in ventilation setups, air distribution lines, or fluid circuits where the flow needs to be split.

Parameter	Value	Unit
number of ports	4
outer diameter	90	mm
inner diameter	84	mm
end fillets	none

Star-pattern connector 3 tubes STL 3D model – Outer diameter 200 mm, wall thickness 3 mm (📦 #7893)

1 object(s) - format STL

Download this STL 3D multi-ways connector model with 3 ways. The three branches are arranged evenly, with an angular step of 120° between each outlet. The connector is designed for tubes with a 200 mm outer diameter and a 194 mm inner diameter. This model uses a wall of 3 mm. The external edges at each branch end are softened with fillets, which helps when inserting into an existing duct. It could be used to branch off flexible ducts, hoses, or rigid pipes in custom layouts.

Parameter	Value	Unit
number of ports	3
outer diameter	200	mm
inner diameter	194	mm
end fillets	outside

Use cases for multi-way tube connectors

Multi-way tube connectors are designed to split or combine a flow in several directions from a single central hub. As 3D-printable parts, they act as custom distribution manifolds, supporting a wide range of tube diameters from three to ten ports while maintaining a consistent geometry for even flow distribution. Their parametric design lets you fine-tune the outer diameter, inner diameter, and wall thickness to match ventilation setups, cooling circuits, or fluid-transfer systems.

For standard branching needs, a Y-shaped 3-way connector is often used to split a single flow into two outlets or merge two inlets into one line. When a project requires a more complex distribution pattern, a 10-way multi-port connector provides a true central hub capable of feeding multiple circuits in parallel — ideal for compact cooling loops, prototyping systems, or technical models — while keeping wall thickness uniform for strength and leak resistance.

Some setups call for less conventional layouts. A 5-way asymmetric connector is a good example, offering a geometry designed to fit tight environments or uneven routing constraints. With parametric 3D printing, multi-way connectors can be tailored with precision, delivering custom routing solutions whenever standard fittings fall short.