Custom Pipe Reducer – Configure a 35 mm to 20 mm Pipe Adapter Online

Configure a Custom Pipe Reducer Online

A pipe reducer connects two pipes or hoses with different diameters. Standard adapters are often limited to only a few sizes, but a parametric pipe reducer lets you create a custom solution for your exact application. Using our online configurator, you can define all important dimensions, generate an STL file and download it instantly or order a professional 3D print.

Common Applications

Custom pipe reducers are widely used for workshop dust extraction systems, vacuum cleaner adapters, ventilation systems, HVAC installations, laboratory equipment, pool systems, irrigation, electronics enclosures and DIY projects. They are especially useful when connecting older equipment to modern hoses or when standard fittings are unavailable.

Parameters Explained

Small Inner Diameter

This value defines the inside diameter of the smaller connection. It should closely match the outside diameter of the pipe or hose that will be inserted.

Large Inner Diameter

The large inner diameter defines the receiving side of the adapter. A common example is reducing from 35 mm down to 20 mm.

Cone Length

The cone length determines how gradually the diameter changes between both ends. Longer transitions generally provide a smoother airflow and a more professional appearance.

Straight Sections

Straight cylindrical sections on both ends improve mounting stability and provide a better sealing surface for hoses or rigid pipes.

Inner Stop

An optional inner stop can be added to define the insertion depth or act as a positioning feature during assembly.

Wall Thickness

Wall thickness directly affects the strength and durability of the adapter. For most applications, 2 to 3 mm provides an excellent balance between rigidity and material usage.

Rounded Edges

Rounded outer and inner edges improve handling, reduce stress concentrations and give the finished part a cleaner appearance.

Outer Collar

An optional outer collar can be used as a mounting flange or positioning stop depending on your application.

Example: 35 mm to 20 mm Pipe Adapter

A popular configuration connects a 35 mm vacuum hose to a 20 mm pipe. Simply set the large inner diameter to 35 mm and the small inner diameter to 20 mm, then adjust the cone length, wall thickness and optional features according to your project.

Why Use a Parametric Pipe Reducer?

Off-the-shelf adapters often require compromises. Even a difference of one or two millimeters can result in loose connections or air leaks. A parametric design allows you to create a reducer that perfectly matches your existing hardware without modifying the surrounding components.

Download the STL or Order a 3D Print

Once your design is complete, you can immediately download the STL file for your own 3D printer or order a professionally manufactured part directly through our service.

Frequently Asked Questions

Can I choose any pipe diameters?

Yes. The configurator allows you to specify custom inner diameters within the supported limits.

What wall thickness should I use?

For most applications, 2 to 3 mm is sufficient. Heavy-duty applications may benefit from thicker walls.

Can I use it for vacuum cleaners or dust extraction?

Yes. One of the most common applications is creating custom vacuum hose adapters and workshop dust extraction reducers.

Can I download the STL file?

Yes. After configuration you can download the STL file immediately or order a professional 3D print.

Configure Your Pipe Reducer Now

Enter your required diameters, cone length, wall thickness and additional parameters to generate a custom pipe reducer in just a few minutes.