Currently you can find only one 3-gallon sprayer in our reviews. The reason is that handheld sprayers are getting too heavy at this size and on the other hand the standard volume for backpack units are 4 gallons. But if you need a 3-gallon, we have it for you:
Very good 
A premium handheld unit which offers several interesting features like a pressure relief valve or 5 nozzles. You can select 1, 2 or a 3-gallon size.
