D.B. Smith

Model # 190374

Internet # 203625508

4 gal. Max Backpack Sprayer

This item has been discontinued.
The Home Depot no longer carries this specific product.



Model # 190374

Internet # 203625508

Designed for the Professional the 4 gal. MAX Backpack Sprayer incorporates a stainless steel frame, pump handle and drive rod. The internal No Leak Pump will never leak on the user and provide trouble free leak free performance. The Max backpack is designed for the most demanding users.

California residents: see  Proposition 65 information

  • Pump delivers up to 150 PSI ideal for spraying high into trees
  • Designed for comfort with thick padded straps, waist belt, chest strap and lumbar support
  • Low pressure regulator delivers a continuous 25 PSI ideal for spraying herbicides
  • Four nozzle system for precision application of chemicals - (brass adjustable, two flat fans and a patented foaming nozzle) accepts all tee jet tips
  • Viton o-rings and seals offer maximum resistance against harsh chemicals
  • Fold away handle with locking storage strap keeps handle out of the way for easy storage
  • Built in agitator delivers constant mixing for liquids, powders and water soluble solutions
  • 21 in. stainless steel wand


Hose length (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Length (in.) 
Product Width (in.) 
Adjustable spray tip 
Applicator type 
Capacity (gallons) 
Shoulder strap 
Sprayer/mister type 


Brand: D.B. Smith
Review Rating: 4 & Up
Applicator type: Sprayer/Mister
Capacity (gallons): 1 - 5
Hose length (in.): 50
1 Question1 Answer

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4 gal. Max Backpack Sprayer
4 gal. Max Backpack Sprayer

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customer support number for db smith sprayer

This question is from 4 gal. Max Backpack Sprayer
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October 8, 2015
there is a hissing sound coming from my 4 gallon db smith sprayer I need their support number to get in contact with them.
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March 9, 2016
Please contact 1-800-311-9903. They will be more than happy to help you.
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Rated 4.4 out of 5 by 14 reviewers.
Rated 5.0 out of 5.0 by Backpack sprayer Well, I've only used it once, so take my review for just that. It went together easily, sprayed great. I can't put 4 gallons on my back, but 3 was OK. I liked the different tips and it was pretty easy to clean and put away. I like the lifetime parts, but if you have to order seals, you pay shipping and handling and for the price, seals should come free. From the manufacturers point of view however, the seals are chemical resistive, so you may never have to change them. Only time will tell. I like a trigger that doesn't get stuck in the open position and this one seems to have a pretty good spring to move it into off. I would recommend this based on my limited use. My advise is to read the owners manual and do what is says for cleaning and operation and this product should last for years. This summer when I spray high into the pecan trees, will be the real test. May 12, 2015
Rated 5.0 out of 5.0 by Excellent Sprayer The sprayer works well and wasn't too difficult to put together. Our yard is quite large and this sprayer really saved me time. I am 65 years old with heart issues and found that the weight was easy for me to handle. I highly recommend this sprayer. May 19, 2015
Rated 5.0 out of 5.0 by Out standing! Best Sprayer I have every used, dose it all sprays form a fine mist two a stream 20' long. Great for tree and hard to reach areas. Different nozeles from wide spray to foaming action. June 2, 2015
Rated 5.0 out of 5.0 by 4 Gal. Max Backpack Sprayer I have not tried using it yet but the quality is apparent. It is probably the last sprayer I will ever buy. May 26, 2015
Rated 4.0 out of 5.0 by My Backpack Sprayer Being a woman 5'6" on an 1/2 acre "Max Backpack Sprayer" was great! It was all I was hoping for. I have purchased others in the past (was very disappointed) but, this one is definitely a home run with me! The arm pumping does take some getting used to but, knowing it's not leaking down your back or will fall apart...(life time warranty)...who can complain! I have already recommended it to a few of our family and friends! January 13, 2015
Rated 1.0 out of 5.0 by 4 Gal Max Backpack Sprayer We have had to replace both wands on the sprayers purchased. Unhappy with the plastic wand inside the metal sleeve. March 25, 2015
Rated 5.0 out of 5.0 by Great sprayer Great product. The steel frame makes the product feel like quality compared to plastic frames on other models. Used to use a 2 gallon sprayer and this product cut the time in at least half because of less time spent filling and no need to drop sprayer to pump it. You will need to pump it regularly if you are trying to cover a large area but it is not a problem as some have complained about the constant pumping needed. Filler opening is very large and easy to fill. Various sprayer tips for differnt spray patterns. Overall great product for the price. June 10, 2014
Rated 4.0 out of 5.0 by Good sprayer The sprayer does the job as expected. I like the warranty on all of the parts should they go bad. The only draw back is that you have to pump the sprayer almost constantly to get good pressure from the sprayer. August 6, 2014
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