Welcome! I am pleased to share with you the Gardena quick connector set that I designed in various sizes to perfectly meet different connection needs. The set is available with different threads and sizes:

• External and internal threads
• Sizes: 3/8", 1/2", 3/4", 5/8" 1" (M18)
• Traditional BSP thread

Material Choice For the best results and long lifespan, I recommend the following materials for printing: PETG, ASA, ABS. PLA can also be used, but I strongly recommend the former materials.
 

Sealing Rings Sealing rings can be printed from TPU material as it is flexible and waterproof. However, for the best results, I recommend using factory sealing rings, especially O-rings, to ensure maximum water tightness and long-term reliability.

It's important to note that high pressure can cause leakage or other issues, so I do not recommend using the connector at high pressure!
I experienced slight leakage at 6 bar, so please don't leave negative feedback because of this. Thank you!
 

For supports, if possible, use support material, or use PETG-PLA or PLA-PETG interface layer mode.
 

Thank you for choosing this 3D printable Gardena quick connector set! I hope you find it useful. If you have any questions, feel free to reach out to me! 
If you have any suggestions or requests, please contact me.
 

This is a revised version of my original model with some additional sizes: [https://www.thingiverse.com/thing:4904221](https://www.thingiverse.com/thing:4904221)