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 22000 1-Gallon Pump Sprayer for Lawn, Garden & Weeds, 2-Pack

CHAPIN 22000 1-Gallon Pump Sprayer for Lawn, Garden & Weeds, 2-Pack

Product ID: 275083109

Details

Brand
CHAPIN
Color
Translucent
Material
Polyethylene
Recommended Uses For Product
Fertilizer
Tank Volume
1 gallons

💧1-gallon translucent tank for easy fluid monitoring

🔄Adjustable cone nozzle with 34-inch hose for versatile spraying

🛠️Modular leak-proof design for easy maintenance

R6378

Duties & taxes included

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

DOUBLE THE POWER - Two sprayers in one pack to tackle multiple tasks or share the garden love.
SPILL FREE REFILLS - Funnel-top tank design ensures quick, mess-free filling and fluid level checks.
BUILT TO LAST SUPPORT - Proudly made in the USA with a 1-year limited warranty and dedicated customer service.
EFFORTLESS LAWN MASTERY - Lightweight polyethylene tank and ergonomic pump handle reduce fatigue during extended use.
PRECISION SPRAY CONTROL - Switch seamlessly between targeted streams and broad sprays for every garden task.

The CHAPIN 22000 1-Gallon Pump Sprayer 2-Pack offers professional-grade lawn and garden care with a translucent, lightweight tank for easy fluid monitoring, an adjustable nozzle and 34-inch hose for versatile spraying, and a modular design that prevents leaks and simplifies maintenance. Made in the USA and backed by a 1-year warranty, this sprayer set is engineered for durability, comfort, and precision, perfect for millennials who demand efficiency and reliability in their outdoor tools.

Specifications

ASIN	B08PZJ6ZTG
Best Sellers Rank	#9 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Lawn & Garden Sprayers
Brand Name	CHAPIN
Color	Translucent White
Customer Reviews	4.4 4.4 out of 5 stars (104,352)
Hose Length	34 inches
Included Components	Hose, Instruction Guide, Nozzle, Poly Extension Wand, PVC Hose, Adjustable Cone Nozzle, Ergonomic Pump Handle, Wand
Item Dimensions W x H	8"W x 18"H
Item Highlight	Two easy-fill sprayers for everyday lawn and garden care, with adjustable nozzles and 34-in hoses for comfortable reach
Item Type Name	Pump Sprayer, 1-Gallon
Manufacturer	CHAPIN
Manufacturer Part Number	22000
Manufacturer Warranty Description	1-year limited
Material Type	Polyethylene (PE)
Maximum Pressure	60 psi
Model Name	22000
Model Number	22000
Number of Items	1
Number of Packs	2
Power Source	manual
Recommended Uses For Product	Fertilizer, Pest Control, Spraying Plants, Lawns, Watering, Weed Control
Style Name	1 Gallon, 2 Pack
Tank Volume	1 gallons
UPC	023883220006
Unit Count	2 Count

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