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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🌿 Spray Smart, Save Time, Own Your Lawn!

SAFETY FIRST DESIGN - Built-in anti-siphon valve protects your water supply from contamination.
PROUDLY MADE IN THE USA - Quality craftsmanship with dedicated US-based support and warranty.
SEAMLESS HOSE COMPATIBILITY - Universal fit with quick-connect options for effortless nozzle swaps.
MAXIMIZE YOUR LAWN CARE EFFICIENCY - Spray up to 20 gallons per tank fill—less refilling, more doing.
PRECISION CONTROL AT YOUR FINGERTIPS - Easy on/off finger trigger for instant spray management.

The Chapin G390 Hose End Sprayer features a 32-ounce chemical-resistant tank capable of treating up to 20 gallons per fill. Designed for universal hose compatibility with quick-connect options, it offers fingertip control and a built-in anti-siphon valve to protect your water supply. Made in the USA with a 1-year warranty, it’s the professional’s choice for efficient, safe, and precise lawn care.

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