It's supposed to be viton seals and chlorine rated so in my opinion you should be safe, just rinse it out good after use. Consider using Jomax / bleach / water solution for heavy mildew, it does really well. If you really have bad mildew you can spray this on several times and it will eventually dissolve all the mildew and kill it.
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SP Systems Sealed Piston Backpack Sprayer — 4 Gallon, 150 PSI, Model# SPS2

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- UV-resistant 4-gallon polyethylene tank
- 6in.W mouth for easy filling
- Exclusive formula Viton® seals and O-rings resist chemicals 50% better than ordinary Viton
- Solvent-resistant pressure chamber
- Comfortable padded shoulder straps
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Description
Key Specs
Reviews
Q & A
Accessories
Warranty
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Product Summary
What's Included
- (1) Sprayer
Downloads
Features + Benefits

- UV-resistant 4-gallon polyethylene tank
- 6in.W mouth for easy filling
- Exclusive formula Viton® seals and O-rings resist chemicals 50% better than ordinary Viton
- Solvent-resistant pressure chamber
- Comfortable padded shoulder straps
- Tank agitator allows use of wettable powders
- Built-in carrying handle for easy transport and handling
- Designed for comfort, convenience and easy operation
Key Specs
| Attribute | Specification |
|---|---|
item# | 251103 |
Brand | SP Systems |
Manufacturer's Warranty | 2 years consumer use / 1 year commercial use |
Ship Weight | 13.9 LB |
Tank Size | 4 Gal |
Pressure | 150 PSI |
| Attribute | Specification |
|---|---|
Seal Type | Viton |
Spray Height | 20 ft |
Spray Pattern | Cone, Stream |
Wand Length | 20 in |
Pump Type | Piston |
Hose Length | 42 in |
Reviews
Questions & Answers
Questions
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· 16 years ago
can it spray 100% bleach for mildew siding?
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Clif· 16 years ago
Helpful?
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steel3127· 16 years ago
don't use 5% bleach for the siding. Use Jomax which will dilute with bleach and yes the product info says it is safe to use with bleach. We checked that out before purchase.
Helpful?
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ProductExpert6· 16 years ago
It can be used with chlorine based materials. It cannot be use with 100% bleach.
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· 15 years ago
Is it possible work with a lower PSI setting or does it only work at 150 psi?
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hotrodder· 15 years ago
It works at lower pressure. You just don't pump the handle as much to get the pressure up. The spray pattern doesn't come out and atomize as well as full pressure but it works.
Helpful?
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ProductExpert27· 15 years ago
The pressure is achieved by pumping the handle on the sprayer. It will not work nearly as well at a lower PSI (or less pumps).
Helpful?
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· 16 years ago
CAN THE FOLLOWING SOLUTION BE USED IN THIS SPRAYER?
I USE THE FOLLOWING SOLUTION TO PRESSURE WASH MY HOUSE. 3 QTS. OF WATER; 2 CUPS OF BLEACH; 1 CUP OF JO-MAX. CAN I USE THIS SOLUTION IN THIS SPRAYER WITHOUT CAUSING DAMAGE.
PRODUCT: SP BACKPACK SPRAYER, MOD.# 01SP2504 1
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Clif· 16 years ago
I have this same exact sprayer, although my main use is roundup, I have sprayed soaps, and also Jomax/bleach solutions without any issues. It has viton seals which are chlorine rated. Like any sprayer, when you run it empty, clean it up with at least a triple rinse. Have had mine for years without one single leak issue. Awesome sprayer, especially when you find it on ebay for $60 b/c someone had it on display in a store collecting dust.
FYI don't spray acid through this one, it's not acid rated, you'd need one that specifically says it's rated for that, and they cost more $$ too.Helpful?
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ProductExpert6· 16 years ago
This sprayer with viton seals is approved to be used with chlorine solutions. Your formula would be okay to use.
Helpful?
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· 15 years ago
Can wettable powders be used in this sprayer?
1 answer-
ProductExpert26· 15 years ago
Yes. The Sp System Sealed Piston Backpack Sprayer has agitation for wettable powders.
Helpful?
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· 15 years ago
Is this sprayer approved for petrolium based driveway sealer?
1 answer-
ProductExpert25· 15 years ago
No backpack sprayers or cylinder type sprayers are designed to handle petroleum based driveway sealer. You would need to go with a construction graded sprayer.
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· 15 years ago
What boom would I purchase with this item to reach 40" swath?
I have a lot that is 1.5 acres and need to apply broadleaf herbicide in minimum time. What boom to you suggest?
1 answer-
ProductExpert26· 15 years ago
There is not a boom for the SP System Sprayer Piston Backpack Sprayer.
Helpful?
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· 16 years ago
Purchased the SP2. Need to spray 25 ft. to reach the top side of my home. Which tip do I need to use ?
1 answer-
ProductExpert27· 16 years ago
The tip that should be used is one of the two .4 tips that come with the sprayer. To achieve that height you want to adjust the pattern to the straightest stream.
Helpful?
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· 16 years ago
How far will spray go? tree tops
1 answer-
ProductExpert13· 16 years ago
The maximum spray distance under perfect conditions is 25'.
Helpful?
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Warranty
Manufacturer's Warranty
2 years consumer use / 1 year commercial use
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Replacement Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
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- $79.99
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Specifications
4 Gal
3.7 Gal
4.5 Gal
4 Gal
150 PSI
-
60 PSI
60 PSI
Viton
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NBR
Nitrile
20 ft
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20 ft
25 ft
Cone, Stream
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Adjustable
20 in
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20 in
20 in
Piston
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Internal Piston
Piston
42 in
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48 in
48 in
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28.2 lb
lb
10.5000 lb
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Variable
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16.0 x 10.0 x 24.0 in
14.0 x 8.5 x 22.0 in
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0.5 GPM
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23 ft




