Watering Bottle Cap - Anti-vacuum

Description

2 sizes - nozzle diameter 3.5cm (19 holes) and 5cm (37 holes)

This watering cap is designed to fit commonly used PET bottles of various sizes. It also includes an Anti-Vacuum System (AVS). Thanks to this, when you start watering, air flows into the bottle through a tunnel that is hidden in the body of the watering cap (see picture IN-CUT).

You don't have to squeeze the bottle to make the water flow!

For small bottles, AVS works without any other improvements, you only have bubbles as a bonus :)

For the proper functioning of the AVS when using larger bottles, where the water pressure is greater, it is recommended to add a tube, straw, etc. For this case, the AVS tunnel ends with two holes in one (see picture IN-CUT) and stackable printable tubes in lengths of 10cm, 15cm, 20cm are also available. If you don't want to print the tube, you can use any tubes with a diameter of 4 or 6 mm, preferably long enough to reach a little above the bottom of the bottle.

Everything is tested and finally after x prototypes I can say that it works correctly, as I imagined. You must have noticed that the whole design is in a hex shape.. yes, we love hex, don't you? :D

I got my inspiration from Watering bottle cap by @agners_238214

Printing

The model is designed to require as few supports as possible. You can use already prepared and tested G-codes. If you are going to use the .STL file, place the surface with the holes on the printing bed and don't forget the supports, they are very important and must support the cap tightly to print correctly.

Material: PLA or PETG (preferably PETG for outdoor use)

Layer: 0.15mm

Infill: 100%

Supports: Yes (under cap only)

Good luck with the printing. I hope you will like it and find it useful.