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.