Chapin has built compression sprayers for decades, and the 28324 moves that experience onto a battery pump that tops pressure back up automatically as you spray. Instead of the pressure decay of a hand pumped tank, you get a constant output, so the spray pattern and dose stay the same across the whole job. Chapin claims up to 24 gallons per charge, which is twelve full tanks.
That figure is the same order as the Scotts and Smith units at 12 tanks, and well above typical budget sprayers that list runtime in minutes instead of gallons. The translucent tank shows the fill level at a glance, and the wide opening reduces spills when mixing concentrate. It suits a homeowner treating weeds, insects or a fertilizer program over a normal lot.
USB-C charging means any phone charger works, which is handy in a shed. Rinse the tank and run clean water through the pump after every chemical job, because residue that dries in the pump is the main cause of failure in this class.
What works
- Pump keeps pressure constant so the dose stays even across the tank
- Up to 24 gallons per charge covers several jobs between charges
- USB-C charging works from any common phone adapter
- Translucent tank and wide opening make mixing cleaner
Watch out for
- Built in battery cannot be swapped for a spare mid job
- Hose and wand are homeowner grade, not a pro rig
Spec sheet
- Tank
- 2 gallon translucent, wide fill opening
- Spray volume per charge
- Up to 24 gallons
- Pressure
- Pump re-pressurizes automatically
- Charging
- USB-C
- Pump noise
- Described as ultra quiet






