Model # MS-401

Internet #204631895

Store SKU #1000025872

ECHO 4 Gal. Diaphragm Backpack Sprayer
0026156913568

ECHO

4 Gal. Diaphragm Backpack Sprayer

$9447 /each

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Product Overview

Featuring heavy-duty, padded shoulder straps to help provide comfortable carrying. The ECHO 4 Gal. Diaphragm-Pump Backpack Sprayer is designed for use with powders, liquids and water-soluble solutions. The 4 nozzles offer stream adjustment for customizable spraying and the wand can be used for left and right-handed application.

  • Professional grade diaphragm pump equipped with Viton seals to withstand harsh chemicals, this pump is designed for use with powders, water-soluble solutions and liquids
  • Professional grade fiberglass wand and industrial grade flow control with comfort grip
  • Extra large tank opening with handle integrated into the tank cap
  • Heavy duty padded straps with waist belt
  • Ambidextrous folding pump lever and guard bar for stability

Info & Guides

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Specifications

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Customer Questions & Answers

This unit comes with four tips for sprayer. How do you change them?

Asked by: Dan
In my bag of nozzle-tips the retaining nut was already attached to the nozzle body and nozzle cap assembly. Attach that nozzle tip (which has the retaining nut) to the spraying wand. Once it's attached you will be able to unscrew the nozzle cap from the retaining nut. Unless it's attached to the wand you won't be able to unscrew the nozzle cap. Hope this helped.
Answered by: sturzles
Date published: 2017-04-22

Same question: How do you change the sprayer nozzle adapters?

Asked by: reb177
Take the main spray tip off and insert like a gasket.
Answered by: MaintenanceMan
Date published: 2015-09-20

how far will the sprayer spray the fluid?

Asked by: Buddy
The sprayer will project four feet in front of you, the same with most pump sprayer that I have used. It is not made to treat tree tops I am very satisfied with mine.
Answered by: Dan
Date published: 2016-05-31

I have narrowed my purchase between 2 ECHO products: the 4 gallon diaghragm sprayer and the 4 gallon piston sprayer. Can you explain the difference. t

piston sprayer. please explain the difference between the two
Asked by: peter
Diaghragm pumps can handle wettable powders and soluble packets better than a piston pump. Piston pumps have smoother action but are not as robust. So it really depends on the product you plan to use.
Answered by: IKillPest
Date published: 2016-08-02
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Customer Reviews

4 Gal. Diaphragm Backpack Sprayer is rated 4.2 out of 5 by 102.
Rated 3 out of 5 by from The diaphragm on this model is NOT replaceable. It IS sold as an assembly for more than the spray... The diaphragm on this model is NOT replaceable. It IS sold as an assembly for more than the sprayer sells for! Buy a SOLO 475 or buy a pro grade Echo. This one will work you harder keeping the pressure up and once the rubber diaphragm breaks down it's done. It's a high-priced disposable unit. New out of the box, the one I purchased did not have threads to hold the spring return cap on the spray wand handle. I found this out as soon as I pumped the sprayer for the very first use. It popped off and emptied some herbicide mix through the opening. I was a long way from the store and decided to epoxy it in place. Will not buy again and will not recommend.
Date published: 2017-02-13
Rated 2 out of 5 by from Works ok but the pump lever isn't drilled at the... Works ok but the pump lever isn't drilled at the right location
Date published: 2017-02-14
Rated 1 out of 5 by from Poor pump design This is a decently built sprayer but after the first use I found the pump stroke to be extremely short. After further investigation I found the diaphragm arm hits the plastic shroud that covers the diaphram. This requires lots of short strokes to pump the unit excessively to keep pressure. Of course this resulted in a worn out arm by the time I finished the first tank of spray application. After looking for the receipt which was gone months ago I opted to take my Dremel tool and cut away the plastic that was impeding the pump arm which made the unit more user friendly. After reading some of the posts here about "clicking" and "popping" during use I can only assume this is a design flaw rather than a one time incident. I have since relegated this unit to weed killer as I don't apply much of that and have purchased another brand for my heavier spraying jobs.
Date published: 2016-08-05
Rated 5 out of 5 by from 401 is awesome Before I purchased this I used a 1 gallon hand held sprayer. After my first use of this new 4 gallon Echo401 I am super happy I have it. It comes almost 90% assembled. U only have to attach the wand (screws right on) and the pump arm (which is one bolt/pin) that locks in place with a pin. It has a few nozzles that come with it if u want to change the one that IS ALREADY ATTACHED to the wand (works great with the default nozzle). Straps feel great and adjust easily​. Holds 4 gallons that makes it easy to cover a lot of yardage. Pressure is great and easy to build. Very sturdy and well built product. The only bad thing I can say is why did I wait so long to buy this?
Date published: 2017-05-25
Rated 5 out of 5 by from Great sprayer. Pumps up fast and sprays well. The fan tip works very well for spraying large pa... Great sprayer. Pumps up fast and sprays well. The fan tip works very well for spraying large patches of weeds. Shoulder straps are fairly comfortable but the connections of the straps at the bottom look like they may break. They are just plastic. Holds four gallons and sprays out every drop. The only bad thing I can say about it is that the wand will not clip into the top of the lid, as it should, and when fully tight the lid is turned about 90 degrees from what is shown in the picture. Overall it's a pretty good sprayer.
Date published: 2017-06-20
Rated 1 out of 5 by from The ONLY thing about this product that is "Echo" is the name. If you visit http://www.echo-usa.c... The ONLY thing about this product that is "Echo" is the name. If you visit http://www.echo-usa.com/Products/Sprayers you won't find model MS-401 and the site will not allow you to register the product as it is not made by Echo. It is made by RL Flomaster ( http://www.rlflomaster.com/lawn-garden/backpack/). If you order parts from Echo, do not expect them to fit. The nozzle provided has only 3 adjustments in the spray pattern and you must disassemble the nozzle to change the pattern. This item is not suited for professionals.
Date published: 2017-04-10
Rated 4 out of 5 by from As some other reviewers have mentioned Echo sells it as a throw away unit essentially. I was extr... As some other reviewers have mentioned Echo sells it as a throw away unit essentially. I was extremely frustrated after searching for hours and unable to find a parts manual. I love Echo and have many Echo products that I swear by. I have not had any issues with it and as always worked excellent. However, I like to have parts manuals on hand so I can easily order parts when need be. Tried to look up parts list on Echo's website and it's not even listed as a model they make. After calling Echo Corp found out that the MS-401 is actually produced by "Flo-Master" that they had transferred me to. Echo just slaps their name on it. You can order parts and anything that you need for it by contacting them. Hope this helps some especially if your looking to replace seals as they often go bad.
Date published: 2017-05-24
Rated 5 out of 5 by from This has been so much better than using the 2 gallon hand sprayer. We have a large area to spray ... This has been so much better than using the 2 gallon hand sprayer. We have a large area to spray and it is great to be able to spray a wider amount at a time and not do the bending down pumping every few minutes. It is made very well for convenience. It is heavy when full and thankfully my 18 year old son can handle it very well.
Date published: 2017-05-23
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