Can this be set as a 10 gallon sprayer?

You would need to know the ratio of product to gallons based on the chemical manufacturer's instructions. For example, 1 Tablespoon = 1 gallon. You would put 10 Tablespoons of product in the sprayer, fill the sprayer to the 10 gallon line and mix well before starting to spray. If you have any other questions about this sprayer that we can help with, please give our technical Customer Service Team a call at 800-950-4458 and they will be happy to assist you. Thank you for your question and for your interest in Chapin Sprayers.

what is the highest level of concentration? I would like to mix a 10-to1 ratio of water to bleach.

You might be better off with a sprayer that has a mixing dial. You cannot vary the mix on this sprayer.

So, if I'm using a product that calls for a ratio of 3 oz./gal., how much product do I put in this thing? I am math challenged, obviously :-(

A gallon is 128 ounces. A quart is 32 ounces. There are 4 quarts in a gallon. If you are saying your bottle sprayer is 32 ounces then I would presume you would need to divide the 3 oz by 4 which is 0.75 ounces. If you have a shot glass most shot glasses are Close to 1 ounce. So you would need to do a shot glass and fill it 3/4 of the way up with your product per usage. At least that is how I calculate it and what I would do.

Can this be used with granular fertilizer?

Hi. The Chapin G390: “Lawn Hose End Sprayer for Fertilizer” can be used with liquid or powder products. When using powders, be sure to mix the solution thoroughly before spraying to avoid clogging. If you have any further questions you can also reach our Technical Support team at 1-800-444-3140 option 1. Thank you for your question.

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CHAPIN G390 32-Oz Hose-End Sprayer for Water-Soluble Fertilizer

Product ID: 22379904

Details

Brand
CHAPIN
Color
Translucent
Material
Plastic
Recommended Uses For Product
Pest Control
Tank Volume
32 fluid

🎯Precise fingertip on/off control

💧32-oz chemical-resistant tank

🔗Universal hose attachment + quick-connect

€ 39.97

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Description

🌿 Spray Smarter, Not Harder — Your Lawn’s New Best Friend!

SAFETY FIRST ALWAYS - Built-in anti-siphon valve prevents chemical backflow, protecting your household water supply with trusted reliability.
PRECISION SPRAY CONTROL - Fingertip on/off valve lets you start and stop spraying instantly, keeping your workflow smooth and uninterrupted.
SEAMLESS HOSE COMPATIBILITY - Universal fit connects effortlessly to any standard garden hose, with optional quick-connect for rapid nozzle swaps—no downtime, just results.
MAXIMIZE LAWN CARE EFFICIENCY - Spray up to 20 gallons per fill with a durable 32-oz concentrate tank designed for water-soluble fertilizers and pesticides.
PROUDLY AMERICAN MADE QUALITY - Expertly crafted in the USA with global materials, backed by Chapin’s lifetime limited warranty and dedicated US-based support.

The CHAPIN G390 is a 32-ounce hose-end sprayer engineered for professional-grade lawn care, delivering up to 20 gallons of mixed spray per fill. Featuring a chemical-resistant tank, universal hose compatibility with quick-connect options, and fingertip on/off control, it ensures efficient, precise application of water-soluble fertilizers and pesticides. Safety is prioritized with an anti-siphon valve to prevent backflow, and the sprayer is proudly made in the USA with a lifetime limited warranty and expert customer support.

Specifications

ASIN	B00UER1SKK
Best Sellers Rank	#2,263 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #16 in Lawn & Garden Sprayers
Brand Name	CHAPIN
Color	Translucent White
Customer Reviews	4.0 4.0 out of 5 stars (4,840)
Global Trade Identification Number	00023883000035
Hose Length	1.5 meters
Included Components	Instruction Guide, Nozzle
Item Dimensions W x H	4.2"W x 8.3"H
Item Type Name	Lawn Hose End Sprayer For Fertilizer
Item Weight	4.8 ounces
Manufacturer	Chapin International
Manufacturer Part Number	G390
Material Type	Plastic
Model Name	G390
Model Number	G390
Number of Items	1
Power Source	manual
Recommended Uses For Product	Pest Control, Watering, Weed Control
Style Name	Handheld
Tank Volume	32 fluid ounces
UPC	023883000035
Unit Count	1 Count

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