How Do You Clean a Garden Sprayer Before Changing Products?

Short answer: clean a sprayer between products by following the pesticide label's cleanout directions, emptying only where the label permits, rinsing the tank, and flushing every part that held liquid. The tank is not the only contamination point: hoses, filters, valves, screens, booms, and nozzles also need attention.

Read both labels first

The product you just used may specify a detergent, ammonia solution, waiting period, or disposal method. The next product may prohibit residues from the first one. If directions conflict or a residue could injure the next crop, stop and ask the product manufacturer or a qualified applicator. Never improvise a chemical mixture.

A practical cleanout sequence

1. Wear the protective equipment required by the label and work away from wells, drains, ponds, children, and pets.
2. Use the remaining spray mixture only where the label allows. Do not pour pesticide or rinsate into a storm drain.
3. Rinse the tank with the label-specified amount of water. Agitate or slosh it so the inside walls are contacted.
4. Flush the hose, pump path, wand, nozzle, filter, and screen. These small areas can retain concentrated residue.
5. Repeat the required rinses, then inspect for odor, film, crystals, or blocked screens.
6. Store the clean, depressurized equipment as directed, protected from freezing and heat.

EPA applicator materials identify plumbing, filters, screens, nozzle bodies, and nozzles as contamination points. Rinsate is still pesticide-containing material: use it according to the label, or dispose of it according to the label rather than treating it as ordinary wastewater.

When a rinse is not enough

Oil-based formulations, dry powders, and products with strong crop-safety restrictions may require a specific cleaner or an extended contact time. Do not use household bleach, ammonia, or detergent unless the label or equipment maker permits it. Also avoid switching a sprayer from herbicide to edible crops unless the label and cleanout directions make that use appropriate.

The UKOKE cordless electric power garden sprayer is listed with a 20V 2A battery and charger. Those specifications describe the listing, not chemical compatibility or a substitute for label instructions.

Bottom line

Clean the entire liquid path, follow the label for rinsate, and keep a dedicated sprayer for high-risk herbicides when possible. This AI-generated cover is illustrative and is not a product photograph or field test.

UKOKE Cordless Electric Power Garden Sprayer — UGS01

Verified price: $66.99 USD. Listing includes a 20V 2A battery and charger. Product labels determine what may be sprayed and how the unit must be cleaned. Price and availability may change; see product page.

View product · Price checked September 17, 2026.