Does this unit have a "release pressure valve" (used for expelling air safely from container before opening)?

No. It does not have a release valve. You have to turn the handle to release the pressure. Use caution if you are using dangerous chemicals as it can blow back at you.

Could we use this to spray pesticides as mist? If yes, then how can we do that setting as I tried, but couldn't find such setting of nozzle.

I wanted it to mist too, but couldn't get it to do that. Even if you adjust the nozzle to spray as opposed to stream, it's still not exactly a fine mist.

Does anyone know how many SQFT two gallons will cover?

It will vary based on the product you are using so read the directions carefully for every product you spray. But in general, 1 gallon for 1,000 sq. ft. That said, I just used it on a lawn bowling green which is about 14,000 sq. ft. The pesticide I used said 1 gallon to cover 1,000 sq. ft. That would have been 12 gallons to cover the green, but when I had finished I used half that amount. This may have been because I walked too fast (I walked about the pace I do when I spread fertilizer). So, depending on how fast you walk, how comprehensive you want your coverage to be, and what the pesticide label suggest, I would say 1 gallon covers at least 1,000 sq. ft and at most 2,000 sq. ft. I also recommend using a dye/colorant so you can tell where you have sprayed and how think the coverage is.

Where is it made? China?

China/USA, either way..horrible product. Brand new from the box and wouldn't spray even a drop. Absolute waste.

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Chapin International 22000 Value Pack, 1 Gallon Sprayer, 2 Value Pack, Translucent White

Product ID: 354367011

Details

Brand
CHAPIN
Colour
Translucent
Material
Polypropylene
Recommended uses for product
Gardening with
Tank volume
3.5 Liters

💧1 Gallon capacity each

🔧Adjustable nozzle for versatile spray

🛡️In-tank anti-clog filter

S$312

Duties & taxes included

In stock

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Description

🌿 Spray Smarter, Not Harder — Your Garden’s Best Ally!

CLOG FREE CONFIDENCE - Built-in anti-clog filter ensures steady, reliable spraying every time
ERGONOMIC LIGHTWEIGHT - Comfort grip handle and translucent tank for easy pumping and fluid monitoring
PRECISION SPRAY CONTROL - Adjustable nozzles deliver everything from fine mist to powerful jet spray
DURABLE READY FOR ACTION - Rust-free polypropylene construction with 34-inch reinforced hose for tough outdoor use
DOUBLE THE POWER DOUBLE THE VALUE - Two 1-gallon sprayers in one pack for uninterrupted garden care

The Chapin 22000 Value Pack includes two 1-gallon multi-purpose sprayers designed for professional-grade lawn and garden care. Featuring adjustable nozzles, an in-tank anti-clog filter, and ergonomic handles, these durable, translucent polyethylene tanks provide consistent spray pressure up to 60 PSI. Ideal for fertilizers, weed killers, and pesticides, this USA-made sprayer set combines reliability and versatility for efficient outdoor maintenance.

Specifications

ASIN	B08PZJ6ZTG
Brand Name	CHAPIN
Color	Translucent White
Customer Reviews	4.4 4.4 out of 5 stars (84,818)
Hose Length	34 Inches
Included Components	12-inch poly extension wand, 34-inch PVC hose, adjustable poly cone nozzle
Item Dimensions W x H	20.3W x 45.7H centimeters
Item Type Name	VALUE PACK, 1 Gallon Sprayer, 2 Pack
Item Weight	3 Pounds
Manufacturer	Chapin
Manufacturer Part Number	22000
Material Type	Polypropylene (PP)
Maximum Pressure	60 Pound per Square Inch
Model Name	22000
Model Number	22000
Number of Items	1
Number of Packs	2
Power Source	Manual
Recommended Uses For Product	Gardening tasks (watering plants, dealing with weeds, managing pests)
Style Name	Knapsack
Tank Volume	3.5 Liters
UPC	023883220006
Unit Count	2 Count

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