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Garden sprayer
I used a basic pressure garden sprayer as the heart of this setup because it gives you manual, controllable pressure without needing a 12V pump. It’s cheap (mine was around the $15 range) and once you keep the dip tube, it’s already set up to pull fluid from the bottom and push it out cleanly.
Buy on Amazon
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Pros
- +Manual pressurization makes it simple and portable
- +Dip tube is already the right length for pulling fluid from the tank
- +Inexpensive base tool for a transfer pump build
Cons
- -Requires cutting/modding the wand and fittings
- -Some parts may not be available at every box store
