Chapin 20000 Made in USA 1 -Gallon Lawn and Garden Pump Pressured Sprayer, for Spraying Plants, Garden Watering, Weeds and Pests

Chapin International builds this 1-gallon sprayer from polypropylene plastic, with a translucent white tank that keeps the liquid level visible from the outside. The funnel-shaped opening at the top widens the target for pouring, and the same wide mouth makes rinsing the interior straightforward once a job is finished. A filter sits inside the tank rather than at the nozzle, and the pump handle is shaped for gripping during both pumping and carrying.

Pressure is built manually, so no batteries or cord are involved. The adjustable cone nozzle covers a range of 0.4 to 0.5 gallons per minute, and the 34-inch hose gives room to reach beds, borders and fence lines. The tank accepts fertilizers, weed killers and pesticides.

• Tank volume: 1 gallon. Dimensions 7.63 inches wide by 15.25 inches high, weight 2.03 pounds.
• Model 20000, made in the USA. Ships as one unit with an instruction guide.

Before filling the tank, make sure the pump is fully depressurized by squeezing the trigger until any remaining pressure releases. When adding liquid, pour slowly through the funnel opening to avoid splashing, and leave a small air gap at the top so the pump has room to compress. Once the tank is charged, test the nozzle over a plain surface to confirm the spray pattern before moving to plants or beds. Twist the nozzle collar toward the finer setting for targeted spot treatments on individual weeds, or open it toward the broader setting when covering larger ground. After each use, rinse the tank with clean water, pump a small amount of rinse water through the hose and nozzle, then discharge any remaining pressure before storing. Store the unit upright in a cool, dry place away from direct sunlight to extend the life of the seals and the translucent tank.

Buyers choosing between pump sprayers at this size should look at hose length, nozzle adjustability and tank material, as these vary across the category. A one-gallon format works well for gardeners who treat smaller plots, raised beds or container plantings, where a larger tank would add unnecessary weight. Carrying and refilling a compact unit is less tiring than managing a two- or three-gallon model when only a small area needs attention.