DIY Spray Paint Pump from Disinfectant Sprayer

**DIY Spray Paint Pump from Disinfectant Sprayer - Free STL**

Turn a cheap disinfectant sprayer into a fully functional spray paint pump for under $1! This DIY project uses a 370 dual-head air pump and a 3D-printed housing (PETG recommended; PLA may soften with heat). Perfect for makers, hobbyists, and anyone looking to upcycle old sprayers into a budget-friendly spray painting tool.

**How It Works:**  
Check out the full build guide on my YouTube video: 

It covers assembly, newbie tips, and fixes for issues like paint bottle spills.

**Tips:**  
- Verify pump dimensions before printing.  
- Feel free to remix the STL for your setup!  

Got ideas to improve this design? Drop a comment here or on the YouTube video! If you like this project, please give it a like and check out my channel for more DIY builds. Happy printing and painting!

**What’s Included:**  
- STL file for the pump housing  
- Alternative housing STL without the switch  
- Designed to fit a 370 dual-head air pump (~$1 online)  
Search for "370 dual-head air pump" online (370雙頭氣泵).

**Assembly Notes:**  
- Use five M3x8 screws for assembly and one M3 screw to secure the neck.  
- Soft rubber tube: 7mm outer diameter, 4mm inner diameter.  
- Optional: KCD1 switch and JST connector for easy assembly.  
- Add a 104 ceramic capacitor for motor durability.