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 20004 Pump Sprayer, 1-Gallon SureSpray Translucent Tank with an Easy Fill Funnel-Top Opening, Adjustable Cone Nozzle & 34" Long Reach Hose, Used for Fertilizer, Pesticides, Weeds & Pests | Durable lightweight tank; ideal for weed control, plant care and cleaning with adjustable nozzle, long hose and easy pump

Product ID: 673947

Details

Brand
Chapin
Color
Translucent
Material
Polyethylene
Recommended Uses For Product
Fertilizer
Tank Volume
1 Gallons

🎯Adjustable cone nozzle for precision

💧1-gallon translucent tank

📏34-inch long reach hose

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€ 102.58

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Description

🌿 Spray Smart, Spray Confident — Own Your Garden Game!

LIGHTWEIGHT ERGONOMIC - Carry and pump comfortably all day with a durable poly tank and fatigue-reducing handle design.
SPILL FREE QUICK REFILLS - Funnel-top opening ensures mess-free filling and easy fluid level monitoring with the translucent tank.
EFFORTLESS PRECISION SPRAYING - Switch seamlessly between targeted streams and broad sprays for ultimate control over your garden care.
BUILT TO LAST MADE IN THE USA - Trusted craftsmanship backed by a 1-year warranty and dedicated US-based support.
VERSATILE LAWN GARDEN ESSENTIAL - Perfect for fertilizers, pesticides, weed control, and cleaning — your all-in-one outdoor sprayer.

The Chapin 20004 Pump Sprayer features a 1-gallon translucent polyethylene tank with a funnel-top for easy, spill-free refills and fluid monitoring. Its adjustable cone nozzle and 34-inch hose provide versatile, precise spraying for fertilizers, pesticides, and weed control. Lightweight and ergonomically designed, it reduces user fatigue during extended use. Proudly made in the USA with a 1-year limited warranty, this sprayer is a reliable, professional-grade tool for efficient lawn and garden maintenance.

Specifications

ASIN	B000E28UQU
Best Sellers Rank	#8 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1 in Lawn & Garden Sprayers
Brand Name	Chapin International
Color	Translucent White
Customer Reviews	4.4 4.4 out of 5 stars (101,261)
Global Trade Identification Number	00023883200008
Hose Length	34 Inches
Included Components	Poly Extension Wand, PVC Hose, Adjustable Cone Nozzle, Ergonomic Pump Handle
Item Dimensions W x H	2.5"W x 15.25"H
Item Type Name	Pump Sprayer, 1-Gallon
Item Weight	2 Pounds
Manufacturer	Chapin International
Manufacturer Part Number	20004
Manufacturer Warranty Description	1-year limited
Material Type	Polyethylene (PE)
Maximum Pressure	60 Pound per Square Inch
Model Name	20004
Model Number	20004
Power Source	manual
Recommended Uses For Product	Fertilizer, Pest Control, Spraying Plants, Lawns, Watering, Weed Control
Style Name	Pump Pressure Sprayer
Tank Volume	1 Gallons
UPC	023883200008 023883200046
Unit Count	1.0 Count

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