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SG 20

A manual backpack sprayer for professionals that maintains constant pressure.

SG 20
Rated 3.9 out of 5 by 29reviewers.
Rated 2 out of 5 by The orange pressure bulb split and cannot buy a new one. The orange pressure tube on the side split even though the pressure in the cylinder was in the low range. So far I have been unable to purchase a replacement orange cylinder and looks like I will have to buy a complete new backpack. The unit would have been used a maximum of 10 times. January 22, 2016
Rated 4 out of 5 by If you need parts, they all come from a dealer This backpack sprayer worked well, until it didn't. I got about 2 years of good use out of it, but when I needed to replace a part, that's when I was in for a surprise. Unfortunately, when I put the sprayer away for the winter, I didn't completely drain the spray wand, and the plastic handle froze, swelled, and cracked. When I went online to look for a replacement handle, I found out that all parts are sold through dealers. I was very disappointed to find that I'd have to go through a dealer for all replacement parts. Not only that, but I couldn't buy just the cracked piece, I would have to buy the whole wand assembly for almost the cost of a whole new complete backpack sprayer. To utilize the remains life left in the main unit, I ended up buying a generic wand for replacement. I won't be buying any more Stihl products simply because the difficulty in obtaining parts for a reasonable cost. January 18, 2016
Rated 5 out of 5 by One of the Best As a professional herbicide applicator, i've found the SG 20 to be simply marvelous. Decent build quality, with power that can't be matched by any sprayer in it's price range that i've come across. While it does have it's issues, it beats every other pack I've come across for one simple reason, maintenance. While most other packs are designed to be used up and thrown away, the SG 20 can be rebuilt indefinitely as long as you've got the parts. On top of that, the entire pressurizing system is located outside the chemical tank, which allows for tear downs in the field with minimal chemical loss. The system it self is dirt simple, comprised of two valves and a pair of ball bearings, and as anybody who uses a tool day in day out is aware, simplicity always trumps complexity. Any broken parts can be stripped and replaced in no time flat with a wrench and flat head screwdriver, which is especially important when you've got a dead line to reach. As someone who puts in ten to twelve hour days, five to six days a week, seven months out of the year...this pack has become as crucial as my ATV. I used to go through one or two packs in a year, Now I'm on my forth season with the same unit, and only a hand full of parts replaced. August 21, 2015
Rated 1 out of 5 by My pump has quit working twicw in one year. Which warranty wont cover. Buy a cheaper sprayer, as it works as well or better and will last longer than my stihl did July 27, 2015
Rated 2 out of 5 by Great at first I loved this sprayer when I first started using it. Wondered what took me so long to get one. After about 10 uses over a years time, I filled it up one day and it simply would not work. Fluid came flooding out of the piston. I always run plenty of clean water and air through the unit when finished spraying. I will look for something different. July 15, 2015
Rated 5 out of 5 by Awsome Sprayer This is the best sprayer out nursery has ever had and we have had 0 problems for 3 years with them only problem now is we need 2 more and i can't seem to find any for sale. anybody know if they discontinued this model? July 14, 2015
Rated 2 out of 5 by The Stihl warranty does NOT include the sprayer handle. The Stihl warranty does NOT include the sprayer handle which is now made of plastic and cracked with 3 months of use (why is this, Stihl?). They also lessened the density of the shoulder straps which makes it WAY more uncomfortable with a full load, and they even deleted the D-rings sewn onto the end of the shoulder strap adjustment so now you have to fuss to grab the end of the strap when cinching down. The new pump system is great, but whomever designed this sprayer does not have much experience/feedback in using them. And the plastic handle/warranty issue: inexcusable. July 5, 2015
Rated 5 out of 5 by For Forestry work... Nothing against lanscapers, but the use and abuse I put these packs through with my Forestry work is much more strenuous.We trek and trudge through kudzu, briars, privet. thick undergrowth head high or taller, often at the same time, and these packs have held up phenomenally!I do agree, a belt would be helpful as would a very simply added chest strap..which is true for the harness that comes with the brush saws...but we've had only minor issues with the plastic wands and for the hundreds of acres we've sprayed, I've only had to replace two...count 'em...TWO o rings and one piston.My guys regularly maintain them, and we're very careful, slow, and methodical. With other brands, it didn't matter how careful you were, they would break.I'll buy any unit anyone wants to sell. I want a slew of them! May 24, 2015
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