SOLO Vario Foam 303 sprayer electric airpump conversion Mijia 2

This is a holder to attach an airpump to a SOLO VarioFoam 303 pumpsprayer, turning it into an automatic foam spayer for less than 50€. Also fits the 2L upgrade tank.

Drill a 10mm hole into the tank, then screw in an aircompressor fitting with an integrated seal like this one: https://www.amazon.de/dp/B093BJBKG4

For the airpump I am using a Xiaomi Mi Mijia 2

You can get rebranded ones from amazon for <45€

3M Scotch ultra-strong automotive doublesided tape (10mm x 1.1mm) is used to stop the ring from moving, see 4th foto

To attach the ring to the holder, use 3x M3x10 screws and 3x M3x5.7 heat inserts

To attach the cage to the holder, use 3x M4x10 screws and 3x M4x8.1 heat inserts

The Mi Mijia 2 Plug is borrowed from this model and is used to shut off the pump