Solo 4-Gallon Backpack Sprayer with Diaphragm Pump #475
- High-pressure backpack sprayer includes a connecting rod actuated diaphragm pump made of high-quality Viton
- Ultraviolet resistant tank
- Heavy duty pressure cylinder and reversible pump lever
- 4-foot high pressure hose
- Solo 1-year limited warranty
Amazon.com Product Description
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 diaphragm pump made of high-quality Viton that resists harsh chemicals and produces a wide pressure range up to 90 psi. In addiction, it features a 4-foot high pressure hose, a spray tube of 55 cm, and can carry up to 12 pounds. With its easy operating shut off valve, 4-1/4-inch opening with filter basket, and 28-inch wand overall length for hard to reach areas, 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.
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Solo 4-Gallon Backpack Sprayer with Diaphragm Pump #475
- Lawn & Patio: 0 pages
- Publisher: Solo
- Label: Solo
- Studio: Solo
- Average Customer Review:
 based on 3 reviews
- Sales Rank in Garden: #40741
Avg. Customer Review:
0 of 0 people found the following review helpful:
Customer Rating: 
Summary: Maintenance shocker 2008-07-01
Comment: I have owned this sprayer for about a year now and the unit has clogged up somehow, even though I'm normally pretty careful to clean after each use. The problem is (as stated by another post) going online to read the instructions on how to take apart, check, clean, and replace parts is WAY too complicated. Maintenance should be limited to "unscrew this, check an o-ring washer and maybe replace, and that's it. If this product was sold to only MIT students it may be ok, or if I had an entire afternoon to attempt the tear down and rebuild it I could get it to work, but at the moment it gives me a headache just to look the instructions and try to decipher them.
2 of 3 people found the following review helpful:
Customer Rating: 
Summary: Have owned the same Solo sprayer for 23 years 2008-03-31
Comment: I bought the diaphragm 475 in 1985 for use in my landscaping business. I can only say good things about it as I have never had one instance of problems until yesterday when it started a leak at the diaphragm which can be remedied with the repair kit. One instance in 23 years is pretty darned good. There is no telling how many gallons have been sprayed through it and how many millions of times the handle has been pumped.
They one thing that has always been religiously consistent with it is that it was cleaned out and propery stored after EVERY use. I think that if anyone who has this sprayer would follow the same things will have very little problems, just as I have.
Solo is a quality built product, and this is the best price I've seen out there. Believe it or not, I paid about $79.00 for mine in 1985, so the price has stayed consistent. I would never own another brand. Being in this business I have seen and used all different brands and none are as dependable. If you're going to get a backpack sprayer, get a Solo.
6 of 7 people found the following review helpful:
Customer Rating:
Summary: Maintenance information completely inadequate. 2007-07-19
Comment: This diaphragm model of the Solo 475 sprayer works well as a sprayer. However it is extremely difficult and maybe impossible to take apart for maintenance. I went to the local dealer that Solo lists as providing repair services in my community. I asked him if they do maintenance and repairs and he said they don't because they are too difficult to work on. I decided to take it apart myself and do the maintenance. So far I have been unable to remove the pressure cylinder from the unit. I went to Solo's website and downloaded all of their maintenance literature and I watched the maintenance video at their website.
The video shows the maintenance person using a one foot long 2X4 and a heavy hammer (they say use a HEAVY hammer)to pound the pressure cylinder cylinder out. I have used a small sledge hammer and still have been unable to remove the cylinder.
I had hoped the "repair shop" listed by Solo would know what to do. They say, no they are just hard to work on. SP Systems also makes a diaphragm style backpack sprayer (sold on Amazon). I would try that brand instead. It couldn't be worse to maintain than this Solo (since it may be impossible to maintain.)
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