<p>I saw a lot of selling PETG water cooling pipes.
So PETG will be the best choice considering all factors.</p>

<p>In addition:
You could use any plastic with the oil instead of water for cooling medium.
Also automotive anti-freeze (G11, G12, G13 ...) designed to be non corrosive and much better than water in terms of cooling.</p>

CC BY-SA 4.0
2019-10-05T16:10:58.927Z
True, I didn' know about PETG tubes. Also the suggestion of using G13 is good: https://www.wolflubes.com/EN_EU/Blog/2016/What-you-need-to-know-about-G13-antifreeze-and-coolant.aspx
FarO
CC BY-SA 4.0
2019-10-04T23:06:10.853Z
2019-10-04T23:06:10.853Z
Serge Rabyking
<p>Let's suppose I want to build a water block shaped exactly for my <a href="https://ubishotends.com/shop/ubis-13s-1230-hot-end" rel="nofollow noreferrer" title="Ubis 13 hot end">Ubis 13s hot end</a> </p>

<p><a href="https://i.sstatic.net/zaOaU.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/zaOaU.png" alt="Ubis 13 hot end"></a></p>

<p>(similar to <a href="https://www.instructables.com/id/Water-Cool-Your-3D-Printer-Nozzle-the-Cheap-and-Ea/" rel="nofollow noreferrer">this instructable</a>), or that I want to circulate water around specific objects to be cooled (like <a href="https://3dprinting.stackexchange.com/questions/10881/water-cooling-stepper-motor-with-aluminum-block">Water-cooling stepper motor with aluminum block</a>).</p>

<p>CNC allows the use of shaped radiators/water blocks, but it is too expensive for home projects and requires the ability to make a part at the first or second attempt, to keep costs low.</p>

<p>3D printing allows me to design jackets which are perfectly matched to the intended part, including gaps for O-rings or matching <a href="https://www.3dhubs.com/knowledge-base/how-design-interlocking-joints-fastening-3d-printed-parts/" rel="nofollow noreferrer">valleys+ridges</a> between the components which also would result in a mostly waterproof seal (just add grease or hot glue...). In this case, water would be in contact with the object to cool and also provide (where suitable) a better interface. Corrosion can be avoided with some additives (in case of aluminium, water should be acidic).</p>

<p>Which common printing material is best for this application? Let's limit the question to materials that can be reliably printed at maximum 270&nbsp;°C (nylon ok, but no polycarbonate or PEEK, for example).</p>

<p>We are talking about very low pressure pumps, mechanical strength is of little relevance.</p>

CC BY-SA 4.0
2019-09-30T13:48:41.310Z
Oooh... I hadn't seen that hot end design, but I really like it. A big limiter to print speeds is the mass of the print head. Smaller/lighter print heads allow for faster movements with fewer "ringing" and jerking effects at the changes, and this hot end looks very light. Couple this with the comment where they also allow some fanless printing (perhaps a much larger fan on the frame to help), and you could end up with a **very** light print head.
Joel Coehoorn
CC BY-SA 4.0
2019-09-30T13:57:20.847Z
My plan is to enclose the printing chamber for ABS/nylon printing (and I use trimmer line, which curls even more than normal nylon), so external cooling would be required. Also, I would like to avoid air flow from the hot end fan so close to the printed part. However, the question is about the material, it may be useful in other cases as well.
FarO
CC BY-SA 4.0
2019-09-30T18:02:05.027Z
As the design is pretty simple from the outside, machining it would be actually pretty simple. Start with the inlet and outlet from the side, flip, start a cylindrical bore of hotend shaft diameter, then bore open to allow flow around the top, add a grove to take a seal topside and in the bottom. put aside. Take a plate, drill core hole, add grove to take seal. Put both parts onto one another in alignment without seal. drill 6 mounting screwholes outside of the grove and tap them in the body. Tap the inlet and outlets. Install the fittings and O-rings. Install hotend. Test.
Trish
CC BY-SA 4.0
2019-09-30T21:57:57.263Z
@Trish thanks for the info, but I don't have the facilities for machining.
FarO
CC BY-SA 4.0
2019-10-06T06:31:56.850Z
You should consider if FFF is the process for creating long term water/coolant tight parts. Constructed from existing tubes as suggested might be a way better solution if you don't have the tools and means to fabricate parts on a lathe.
0scar
<cooling><filament-choice><water-resistance>
Which filament to use for an application involving water circulation?
FarO
# Which filament to use for an application involving water circulation?

(Asked by: username_0 on 2019-09-30)

Let's suppose I want to build a water block shaped exactly for my [Ubis 13s hot end](https://ubishotends.com/shop/ubis-13s-1230-hot-end "Ubis 13 hot end")

[![Ubis 13 hot end](https://i.sstatic.net/zaOaU.png)](https://i.sstatic.net/zaOaU.png)

(similar to [this instructable](https://www.instructables.com/id/Water-Cool-Your-3D-Printer-Nozzle-the-Cheap-and-Ea/)), or that I want to circulate water around specific objects to be cooled (like [Water-cooling stepper motor with aluminum block](https://3dprinting.stackexchange.com/questions/10881/water-cooling-stepper-motor-with-aluminum-block)).

CNC allows the use of shaped radiators/water blocks, but it is too expensive for home projects and requires the ability to make a part at the first or second attempt, to keep costs low.

3D printing allows me to design jackets which are perfectly matched to the intended part, including gaps for O-rings or matching [valleys+ridges](https://www.3dhubs.com/knowledge-base/how-design-interlocking-joints-fastening-3d-printed-parts/) between the components which also would result in a mostly waterproof seal (just add grease or hot glue...). In this case, water would be in contact with the object to cool and also provide (where suitable) a better interface. Corrosion can be avoided with some additives (in case of aluminium, water should be acidic).

Which common printing material is best for this application? Let's limit the question to materials that can be reliably printed at maximum 270 °C (nylon ok, but no polycarbonate or PEEK, for example).

We are talking about very low pressure pumps, mechanical strength is of little relevance.

**Tags:** cooling, filament-choice, water-resistance

> **Comments:**
> **username_1**: Oooh... I hadn't seen that hot end design, but I really like it. A big limiter to print speeds is the mass of the print head. Smaller/lighter print heads allow for faster movements with fewer "ringing" and jerking effects at the changes, and this hot end looks very light. Couple this with the comment where they also allow some fanless printing (perhaps a much larger fan on the frame to help), and you could end up with a **very** light print head.  
> **username_0**: My plan is to enclose the printing chamber for ABS/nylon printing (and I use trimmer line, which curls even more than normal nylon), so external cooling would be required. Also, I would like to avoid air flow from the hot end fan so close to the printed part. However, the question is about the material, it may be useful in other cases as well.  
> **username_2**: As the design is pretty simple from the outside, machining it would be actually pretty simple. Start with the inlet and outlet from the side, flip, start a cylindrical bore of hotend shaft diameter, then bore open to allow flow around the top, add a grove to take a seal topside and in the bottom. put aside. Take a plate, drill core hole, add grove to take seal. Put both parts onto one another in alignment without seal. drill 6 mounting screwholes outside of the grove and tap them in the body. Tap the inlet and outlets. Install the fittings and O-rings. Install hotend. Test.  
> **username_0**: @username_2 thanks for the info, but I don't have the facilities for machining.  
> **username_3**: You should consider if FFF is the process for creating long term water/coolant tight parts. Constructed from existing tubes as suggested might be a way better solution if you don't have the tools and means to fabricate parts on a lathe.  

---

## 1 answers

### Answer by username_4 on 2019-10-04. Score: 1 | Accepted answer

I saw a lot of selling PETG water cooling pipes.
So PETG will be the best choice considering all factors.

In addition:
You could use any plastic with the oil instead of water for cooling medium.
Also automotive anti-freeze (G11, G12, G13 ...) designed to be non corrosive and much better than water in terms of cooling.

> **Comments:**
> **username_0**: True, I didn' know about PETG tubes. Also the suggestion of using G13 is good: https://www.wolflubes.com/EN_EU/Blog/2016/What-you-need-to-know-about-G13-antifreeze-and-coolant.aspx  

---

