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SOLO 425 4-Gallon Piston Backpack Sprayer, Wide Pressure Range up to 90 psi

4.3 4.3 out of 5 stars 1,507 ratings

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Sprayer

Purchase options and add-ons

Brand SOLO
Tank Volume 4 Gallons
Color white
Material High Density Polyethylene (HDPE)
Item Weight 4.7 Kilograms

About this item

  • Easily spray liquid disinfectants, fertilizers, herbicides, pesticides with Solo's high-performance piston pump for tree, shrub and plant protection
  • Solo’s 425 backpack sprayer includes a 20-inch unbreakable wand that securely connects to a 48-inch nylon-reinforced high-pressure hose for an extended reach
  • Four easily changeable commercial-grade spraying nozzles-Plastic Adjustable, Fan Spray, Hollow Cone, Jet Stream nozzle and is TeeJet compatible
  • Designed with a commercial shut-off valve that securely locks in either the on or off position to minimize user fatigue, the pump handle is interchangeable for left or right-hand operation
  • Solo's rugged metal frame with an extra-large tank opening makes it easy to fill and clean quickly
  • Thoughtfully designed with Viton seals placed in key locations to ensure long service and durability

Customer ratings by feature

Easy to assemble
4.1 4.1
Easy to use
4.0 4.0
Value for money
3.5 3.5
Durability
3.3 3.3

Frequently bought together

$101.32
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$37.05
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$13.19 ($0.82/Fl Oz)
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In Stock
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This Item
SOLO 425 4-Gallon Piston Backpack Sprayer, Wide Pressure Range up to 90 psi
SOLO 425 4-Gallon Piston Backpack Sprayer, Wide Pressure Range up to 90 psi
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Price-16% $101.32
List:$119.99
$89.99$79.99$115.37$109.90
Delivery
Get it as soon as Sunday, Mar 24
Get it as soon as Tuesday, Mar 26
Get it as soon as Tuesday, Mar 26
Get it as soon as Sunday, Mar 24
Get it as soon as Sunday, Mar 24
Customer Ratings
Easy to use
4.0
3.7
4.3
4.6
4.4
Value for money
3.5
3.5
4.0
4.6
3.9
Easy to assemble
4.1
3.2
2.7
4.2
Sold By
Amazon.com
Amazon.com
WOEKBON
Amazon.com
Amazon.com
tank volume
4 gallons
4 gallons
4 gallons
4 gallons
hose length
48 inches
48 inches
48 inches
power source
Battery Powered
Battery Powered
Hand Powered
Hand Powered
material
High Density Polyethylene (HDPE)
High Density Polyethylene (HDPE)
Bamboo
Acrylic
number of items
1
1
1
style
Sprayer
4 Gal
Compact
Adjustable,Ergonomic
Adjustable

From the brand


From the manufacturer

Solo

Solo 425 Professional Piston Backpack Sprayer

Best in Class Features

The Solo 425 manual 4-gallon 60 psi high-pressure backpack sprayer features an ultraviolet resistant tank, felt padded polyester straps, a heavy duty pressure cylinder, and a reversible pump lever.

Best in Class Quality

The Solo 425 is made of all high-grade, corrosion resistant plastic, and is designed to ensure no metal or rubber parts are made vulnerable to chemicals.

Full Range of Applications

Easily and effectively handles disinfectants, fertilizers, herbicides, pesticides, and formulations for tree, shrub and plant protection and wood and concrete finishing and treatments.

Key Features

  • High performance piston pump
  • Rugged metal frame for stability
  • Extra-large tank opening
  • 28" unbreakable wand
  • 48" high pressure hose
  • Double filtration system

Professional Quality and Design

4-Gal, UV Resitant, High Density Polyethylene Tank

Easily and effectively handles fertilizers, herbicides, pesticides, and formulations for tree, shrub, and plant protection, as well as disinfectants, and cleaning solutions.

Piston Pump with Viton Collar

Produces a pressure of up to 90 psi enabling the operator to perform virtually every spraying task.

Padded Straps

Padded polyester straps for greater operator comfort, preventing fatigue.

4.25 inch Opening

Allows for Easy Filling and Cleaning.

Solo 425 Solo 475-B 475-B-DELUXE Solo 473-P Solo 416-Li Solo 451
Solo 425 Solo 475-B 475-B-DELUXE Solo 473-P Solo 416-Li Solo 451
Customer Reviews
4.3 out of 5 stars
1,507
4.4 out of 5 stars
400
4.0 out of 5 stars
325
4.1 out of 5 stars
183
3.2 out of 5 stars
37
Tank Size 4-Gallons 4-Gallons 4-Gallons 3-Gallons 5-Gallons 3-Gallons
Large Opening
Pump Type Piston Diaphragm Diaphragm Piston Motorized Motorized
Deluxe Shoulder Straps
Brass Nozzle
Pressure Regulator
Operation Manual Manual Manual Manual Lithium Battery Gas Powered

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here. [PDF ]

Feedback

SOLO 425 4-Gallon Piston Backpack Sprayer, Wide Pressure Range up to 90 psi


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Product guides and documents

Product Description

Product Description

Built for comfort. Built for convenience. Built to last. SOLO sprayers are professional grade, triple test inspected and made in the USA. The SOLO 425, with a connecting rod-actuated piston pump, can produce a wide pressure range of up to 90 psi and is capable of performing virtually every spraying task. With a proven piston pump, you will be reliably equipped for applying spray liquid or insecticides in your garden. A low number of wearing parts and sturdy technology ensure a long service life and minimum maintenance. The large filling aperture for convenient filling of the tank and smooth-running pump make spraying pleasant work. The ergonomic design contours to your back for greater comfort.

Amazon.com

The Solo manual 4-gallon 90 psi high-pressure backpack sprayer features an ultraviolet resistant tank, felt padded polyester straps, a heavy duty pressure cylinder and reversible pump lever. The high pressure backpack sprayer is made of all high-grade, corrosion resistant plastic, with no metal or rubber parts made vulnerable to chemicals. The chemical backpack applicator includes a connecting rod actuated piston pump to produce a wide pressure range up to 90 psi, 4-foot high pressure hose, a spray tube of 20 in. and can carry up to 45 pounds. With its easy operating shut off valve, durable plastic parts, and 4-1/4-inch opening, it can handle disinfectants, fertilizers, herbicides, and pest control products for efficient tree, shrub, and plant protection. This tool is backed by a 1-year limited manufacturer's warranty.

Important information

To report an issue with this product or seller, click here.

Customer reviews

4.3 out of 5 stars
4.3 out of 5
1,507 global ratings

Customers say

Customers like the performance, ease of assembly, and value of the pump sprayer. They mention that it works great, is easy to assemble, and makes applications for weeds so much easier. Customers appreciate the value. On the other hand, some complain about the leakage and straps. They say that the straps don't stay on, and they are disappointed with the pressure. Customers also have different opinions on quality.

AI-generated from the text of customer reviews

87 customers mention78 positive9 negative

Customers like the performance of the pump sprayer. They say it works great, has no issues, and is easy to operate. Some say that it has helped tremendously.

"Very good sprayers and have used for several years" Read more

"...This piston backpack worked fine. I am 5'8" tall and almost 70 years old and the weight and distribution were acceptable...." Read more

"...It works well for me. I bought a longer tube for the wand so I can reach higher in my trees...." Read more

"...when I was removing popcorn ceilings, I've used it many times since, No issues. The quality of build and functionality is better than I expected...." Read more

54 customers mention51 positive3 negative

Customers find the pump sprayer easy to assemble. They mention that it holds a lot more than a standard sprayer, and is easy to use, clean, and maintain. The job takes a little less time, and the pump arm works great. It makes applications for weeds so much easier, and wear out any parts are easy to rebuild or repair.

"...the ability to fill this with 4 gallons at a time makes the job take a little less time and that's helpful too...." Read more

"...I find it very easy to use...." Read more

"...I've had several tank sprayers and this one is far more convenient. I can spray the perimeter of my house with one tank in half the time...." Read more

"...It was easy to unpack and get started with.The pump arm works great...." Read more

39 customers mention32 positive7 negative

Customers like the value of the sprayer. They say it's a nice unit for the money, and they are pleased with the quality and price.

"...Only time will tell how well it holds up, but so far I love it. Well worth the money." Read more

"...All in all very worth the price and they spray quite well." Read more

"This sprayer is very high end! Works great" Read more

"...This is a great product at a very good price. Since I tend to be lazy, next time I will order a battery power sprayer" Read more

144 customers mention86 positive58 negative

Customers are mixed about the quality of the pump sprayer. Some mention that it's a good quality sprayer, while others say that it is a terrible product. The wand is flimsy plastic, the shoulder straps are floppy, and the Solo Sprayer was defective.

"Seems to be a good quality sprayer. I have not used it yet." Read more

"...spray handle itself gave me some trouble and soon became stuck in the constant-spray position because the plastic was soft and got wedged into the..." Read more

"...because it is well balanced and the handle for the pressure pump is easy to access when walking...." Read more

"...Durable, Quality Tool. If it leaks or has issues building pressure, get an O-ring for the top cap" Read more

47 customers mention6 positive41 negative

Customers are dissatisfied with the leakage of the sprayer. They mention that the product tends to leak everywhere, and the fluid starts coming out through the bottom. Some customers also mention that after they release the trigger, the spray continues dripping.

"...coming loose caused my pants to get wet because the fluid started coming out through the bottom...." Read more

"...Sometimes the sprayer continues dripping after you've released the trigger.The shoulder straps are really narrow and need to be wider...." Read more

"...And best of all...the lid leaked my first tank of herbicide! Yay...fabulous...glyphosate all over my shirt, back, pants, belt...REALLY!!..." Read more

"After priming and getting ready to spray the nozzle leaks and cannot stop. I’m wasting chemical until it loses pressure." Read more

30 customers mention5 positive25 negative

Customers are dissatisfied with the pressure of the pump sprayer. They mention that it would not pump up and build pressure, the bladder does not work, and it stopped pressurizing. Some customers also report that the sprayer continues to stream herbicide at low pressure for 5-6 seconds after they release it. They say that it requires constant pumping to get even a little spraying done, and that nothing came from the pressure cylinder.

"...UPDATE: was using the pump a few days an ago and it just stopped pressurizing...." Read more

"...would it does work it's very strong in the pressure is very high and it's very easy to control." Read more

"After only a month of owning, used around 3 times it stop building pressure, essentially stop working..." Read more

"...Anyway decent sprayer BUT doesn't hold pressure well as you are almost constantly pumping the handle to maintain good pressure...." Read more

19 customers mention5 positive14 negative

Customers are dissatisfied with the straps of the sprayer. They mention that the strap is disappointing, the strap does not stay on, and the padded straps do not have a chest tie. Some complain that the shoulder strap is inadequate and does not have the chest strap. Overall, some customers find the strap to be smaller than pictured.

"...works well, and I left off the 5th star only because the straps don't have a chest-level cross-latch...." Read more

"...It works fine for me that way. I, too do not like the straps and pins. Straps keep sliding off my shoulders...." Read more

"...Other benefits:-Backpack straps are easy to adjust.- Pressure is easy to manually adjust.-..." Read more

"...No leaking issues with my sprayer, it works as it should. Straps are smaller than pictured but still not too bad to carry around...." Read more

Great for Organic Gardening Uses
4 Stars
Great for Organic Gardening Uses
I bought this sprayer based on the recommendations of a Soil Health Expert for use with compost tea, based on pressure and nozzle opening size to allow for microbes to pass through.The assembly instructions are not user-friendly and I struggled to follow them. (And I rarely struggle with instruction manuals). Thankfully, I was able to find a video on YouTube after seArching “Solo 425 backpack sprayer assembly”. The video from Planet Mojo is slightly slow, but easy to follow and helped me figure it out.If using for compost tea, don’t forget to remove the filter. It is located in the spray nozzle, but you will need to remove the top 2 pieces before accessing it.After assembly, it has been relatively easy to use.Other benefits:-Backpack straps are easy to adjust.- Pressure is easy to manually adjust.- Filter at opening is great for compost tea that was not made in a bag.Overall, I would probably continue to recommend this sprayer for use with compost teas and organic fertilizers. I did a lot of research prior to purchasing and this seems to be the best one.
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Top reviews from other countries

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EC
5.0 out of 5 stars Works great!
Reviewed in Canada on June 10, 2023
Style: SprayerVerified Purchase
Kate A.
5.0 out of 5 stars Great value
Reviewed in Australia on September 24, 2020
Style: SprayerVerified Purchase
Amazon Customer
5.0 out of 5 stars came quickly
Reviewed in Canada on April 12, 2022
Style: SprayerVerified Purchase
Phillip havas
1.0 out of 5 stars Poor quality
Reviewed in Australia on November 13, 2020
Style: SprayerVerified Purchase
Liliane Dupont
5.0 out of 5 stars Très bon produit
Reviewed in Canada on May 25, 2022
Style: SprayerVerified Purchase