The „Four In Two“ PTFE Adapter

This is the ultra compact 4 in 2 adapter - It allows you to toggle four filament inputs between two outputs with a simple hand movement.

Followers of my channel will surely recognize immediately that the mechanics of this model are similar to those of my "Modular Nozzle Management System". 

Update December 13th 2025:

I posted this mounting system today, including a H2, wall and skadis option.

https://makerworld.com/models/2112168?appSharePlatform=copy

 

For my personal use, I also have this adapter for the same purpose as the NMS: to quickly reconfigure which of my multiple AMS units is connected to which nozzle of my H2D or H2C. 

Over time, I've received several messages from other users who have set up their AMS quite differently than I have, and therefore the NMS with its predefined mounting location on the printer might not always be the optimal solution. This compact version, which can also be mounted in a flying position if necessary, is aimed at all those setups! 

Each of these adapters can manage up to four AMS. However, it's also possible to connect multiple "Four in Two" splitters to the printer. Therefore, the full capacity of four AMS and eight AMS HT could be connected in this way.

 

When I designed this model, I also considered many other scenarios where this switchable splitter could be useful. For example, it could manage multiple spools of external filament between two printers.

Combined with my "Accelerated Manual Filament Feeder https://makerworld.com/en/models/1352528"  and “Retracting Spool Holder https://makerworld.com/en/models/1233835” models, there would certainly be a lot of possibilities! The ecosystem is growing, and will continue to grow!

 

 

What was very important to me, was making the model accessible to more people. 
To achieve this, I implemented the following measures:

-Fewer hardware components 
-no specified installation location
-Simpler materials 
-Faster printing time 
-Fewer assembly steps 
-A significantly more compact design 
-Lower weight

 

The four-in-two adapter completely eliminates the need for the two 4-in-1 adapters I previously used for my PTFE tubing organization systems. 

But initially, I had my doubts about the resistance of the 3D-printed filament channels. 

However, after several tests, failures, improvements, and refinements, I can assure you that this unit, when correctly assembled, has significantly lower resistance than a switching module of the Modular NMS.

 

For my personal use of 3D printing, this characteristic is crucial. I primarily print with CF and GF filaments. These hard, inflexible filaments put the most strain on the AMS motors. 

Since my setup requires long PTFE tubes due to the large number of AMS prints and the way I've built it, it was especially important to keep the resistance caused by the Four In Two as low as possible. 

 

 

###############
####HARDWARE####
###############

 

4Pcs - Dowel Pins, 6mm long, 2mm diameter / 1x Maker Supply DA007

16 Pcs - Round Magnets, 8mm diameter, 2mm thick / 1x Maker Supply CA005

 

8 Pcs -  Self Cutting Screws, BT3x6mm / 1x Maker Supply AA107
 

6Pcs - PC4 M6 PTFE Fittings / 2x Maker Supply FC001
those that let you push the tube THROUGH, highly important!!

 

 

###############
####PRINTING####
###############

Most PTFE tube splitters are printed in an upright position, which inevitably results in some resistance along the layer lines.

This is not optimal for minimal resistance. (btw It's my own model that i am criticizing here :D)

 

Each of the two filament manifolds of the “Four in Two” consists of two halves printed horizontally.

 In this orientation, the outer walls of the filament channel are printed in the direction of the filament path, which is much better for the overall structure's resistance.

For the second side of the manifold, I incorporated a single color change into the print profile, which allows you to combine a transparent material with a non-transparent one to create a kind of window through which you can roughly see where the filament is in the channel.

The transparency effect isn't perfect due to the low layer height of 0.12mm, but I think it adds a cool visual touch!
I'll try to improve this effect over time. Perhaps with variable layer height. 
I personally prefer translucent PETG to transparent PLA, so I used it here. If you don't like it, you can simply skip the plate with the two parts and print them from the Single Color/Single Material Profile.
 

The slider and the output nozzle are printed in this orientation. 

Please do not attempt to reorient them. The filament path would not be perfect in any other printing orientation.

 

The two main parts are ideally printed with support interface material. 

It is essential that these surfaces are printed as cleanly as possible, as the sliders will later rest against them. 

If there are any raised areas, the paths in the sliders may no longer be perfectly concentric with the filament paths in the manifold.

In the Single Color/Single Material profile, standard supports are used. Please be aware before printing that you may need to perform post-processing steps to achieve a good result. But it can be done of course. 

 

Since the labels are quite small, I decided to adjust the print profile and slightly modify the color distribution compared to the rendered images.

This allowed me to achieve visually better results. I printed these on a supertack plate for a smoother surface.  
Otherwise, there's not much to say about these simple PLA parts! :)

 

 

###################

The Assembly Guide can be found as a PDF attached to the Post!
###################
 

I really hope you like this one guys! 

Boost MeYou can support me by boosting, liking, sharing and printing this project!
As always, I remain with the promise to continue providing you with awesome projects in return!

Kind regards, Simon, MiM