Model # MS-401

Internet #204631895

Store SKU #1000025872

ECHO 4 Gal. Diaphragm Backpack Sprayer


4 Gal. Diaphragm Backpack Sprayer

$94.47 /each

Frequently Bought Together

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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Customer Questions & Answers

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

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

Asked by: Daniel
The three adapters fit inside the main nozzle. Use one at a time or use it without an adapter
Answered by: EricG
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: Daniel
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 86.
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 1 out of 5 by from Leaking Top You would think with the oversized lid and handle that you would get it tight enough to not leak but that's not the case with the one I bought. Used it a handful of times in the last year and when I put it on my back the lid leaks. Won't buy this brand ever again.
Date published: 2016-09-14
Rated 2 out of 5 by from Poor pumping mechanism I purchased one of these from HD, took it home, assembled it and tried it out with water before using it with any chemicals. The handle motion is very jerky or mechanically unsmooth and the lever would many times stick in the down position and then pop back up after a few seconds. I thought this was a defect so I returned it to the store and exchanged it for another one. This one also had the same behavior, so it went back too. Too bad because other than a poor pumping system the unit is well constructed with thick padded straps and wide mouth tank. Ended up purchasing the Echo MS-402 with the internal piston pump. A much, much smoother pumping action and seems to build up pressure faster. I'm not sure if these 2 units are made especially for Home Depot because they are not listed on Echo's product website.
Date published: 2016-04-13
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 What I thought it would be!! This Echo backpack sprayer is just what I needed. It was easy to assemble and comfortable when wearing. It is definitely a great upgrade from my former Ortho hand-held tank sprayer. I easily sprayed non-stop without having to set down and pump, so I saved time because I could keep on moving and spraying while I pressurized it.
Date published: 2016-05-18
Rated 5 out of 5 by from My 30 year old son used this Back Pack Sprayer to sterilize our Pet Boarding Kennel. He said it ... My 30 year old son used this Back Pack Sprayer to sterilize our Pet Boarding Kennel. He said it was just a little heavy but really not a problem. He appreciated how fast he was able to get this huge project done. I have offered it to my local County Animal Shelter if they ever have a need for it. Love this product!!
Date published: 2016-12-01
Rated 5 out of 5 by from Great purchase I love this sprayer. Works great and I can cover a lot of area in a short time. It's heavy when filled with 35lbs of fluid but that's to be expected. The plastic clips and straps are a little uncomfortable on my lumbar/spare tire area. I might wrap them with padding and a lil black tape.
Date published: 2016-09-06
Rated 1 out of 5 by from do not buy we have purchased several of these this year. they work for the first time and maybe the 2 no time and then they lose pressure completely no matter how many time you pump it
Date published: 2016-11-29
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