Question about Roundup D.b. Smith Backpack Sprayer

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Why my db smith backpack sprayer wil not hold pressure

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 111 Answers

SOURCE: When I pump my sprayer

I would return it to where you bought it. It sounds like the seal between the cover and the container is defective. Take a small container of soapy water and gently sponge it all around the cover of the sprayer. Pump it up and note where the bubbles form--this is where your leak is.
If you are not able to return it, check to see if there is a rubber insert that should be evenly seated around the cover where it screws on. You may be able to tighten that gap by using pipe thread tape around the ridges, but this is a temporary situation.

Posted on Aug 31, 2011

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Stanley backpack sprayer top is stuck....... how do I get it off?


Hi Chris:
Seems a bit extreme to consider using the 12 gauge. I've found that a .22 works quite well. (Humour)
Hint! Pressurized tanks must have the pressure relieved BEFORE the lid can be removed.
If the lid has been over tightened or has stuck, you'll need to get more leverage to unscrew it. Sometimes a rag wrapped around it is all it takes.
You can also try pouring hot water over the cap. Lay the tank flat so the rim of the cap gets the heat. Wrap an old towel around it first so it gets a good hot soak.
Should come off without the artillery.
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www.stihlusa.com > Products > STIHL Products
StihlSTIHL sprayers provide power, precision and portability exclusively used by pest ...Technology & Features · Online Catalogs & Brochures · Top Rated Products. Find a Specific Product: Sprayers ... and high pressure - STIHL gasoline-powered backpacksprayers deliver power, comfort and ease of use. ... Cut-off Machines.

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Is there someplace to buy a whole rubber washer repair/rebuild kit for a Roundup 4gal BP sprayer? It's square and was built in 2005 unlike the rounded newer ones. thx joe


I've found buying one thats too big and cutting it to size and shape works best on my sprayer. You could go for a sheet of rubber and cut it all out with an exacto knife too.

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Hose end sprayers are the simplest and least expensive of the category. A sprayer jar is attached to a regular garden sprayer. Concentrated material is added to the sprayer jar. An adjustment on the jar determines the amount delivered. The force of the water through the hose pulls the material up from the jar and mixes and dilutes it with the water. A built-in anti-siphon device prevents unused material from being pulled back into your water supply. Compression or tank sprayers are the most common type of spray equipment. Concentrated material is added to the tank. Water is then added to a marked fill line. The remaining air is pressurized by pumping the handle a designated number of times. A control lever on the wand controls the spray pattern and amount. Compression sprayers provide a precise, on target, non-drift spray good for soil and lawn pests. Adjust the sprayer for a coarse, drenching spray, a concentrated stream or a fine mist. Tank capacities range from 1 quart to over 3 gallon for handheld models. Homeowner type backpack sprayers hold up 4 gallons. The tanks may be made from polyethylene plastic, galvanized steel or stainless steel. In addition to treatments for pests and diseases, compression sprayers are designed for applying cleaning solutions for decks and siding. Backpack sprayers are operated in the same manner as the handheld compression sprayer. The over-the-shoulder configuration makes it easier to carry the heavier load of material. Some backpack models also use a lever-style pump to maintain pressure without removing the unit form your back. Powered sprayers rely on a gasoline engine for spray power. Great for larger yards or gardens due to portability and capacity (12 gallons). Dusters are a slightly different breed. Dry powders (mostly for blooming plants such as roses) are added to a canister and applied by manually pumping. NOTE: Compression sprayers deliver liquid under pressure. Compression sprayers are powerful and efficient tools. This fact also makes them potentially dangerous. Always read the manufacturer's instructions and safety precautions carefully.

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