0026156913568

ECHO

Model MS-401

Internet #204631895

Store SKU #1000025872

4 Gal. Diaphragm Backpack Sprayer

$89.97 /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

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Customer Questions & Answers

38 Questions85 Answers

Customer Questions & Answers

4 Gal. Diaphragm Backpack Sprayer
4 Gal. Diaphragm Backpack Sprayer

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This question is from 4 Gal. Diaphragm Backpack Sprayer
 
11 answers

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

This question is from 4 Gal. Diaphragm Backpack Sprayer
Asked by
Southcentral PA
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January 17, 2014
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Answers (11)

June 23, 2014
Answer: 
Take the main spray tip off and insert like a gasket.
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Asked by
Utah
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April 22, 2014
Answer: 
I called the Customer Service department of Flo Master (800-253-4642) who is the company who actually makes the unit for Echo. They walked me through it and emailed me a diagram of the different options.
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Asked by
New Mexico, USA
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February 22, 2014
Answer: 
Unscrew the tip and put one of the nozzle adapters inside. That one puzzled me for an hour before I figured it out
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Asked by
North West, Loudoun Virginia
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February 3, 2014
Answer: 
Following the directions in attached picture
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February 3, 2014
Answer: 
Unscrew the variable spray tip and then remove the black rubber washer from the retaining nut. I gently pried the washer out with a small screwdriver. With the washer removed, push the spray tip out of the securing nut. It will take a little bit of pressure to do this. With the spray tip removed from the retaining nut, you can drop the fixed spray nozzles into the nut, then the washer and reassemble.
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Asked by
Wellsville, NY
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February 2, 2014
Answer: 
The "nut" that holds the adjustable nozzle to the wand is removable - just hold the adjustable nozzle in one hand and push up on the nut, wiggling to dislodge the rubber washer holding the nozzle in place.
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Asked by
Virginia, USA
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February 1, 2014
Answer: 
You have to completely dis-assemble manual's part 592.
So if you are holding the wand with factory installed nozzle. Then remove the top most tip that is labeled as "B". Then, just below that, remove the part that is labeled as "1". (I call it Part-1) Now push the long nozzle out of part -1 which has a washer inside it. Washer comes out and then you slide the new nozzle into the Part-1. Put the washer
Read More
You have to completely dis-assemble manual's part 592.
So if you are holding the wand with factory installed nozzle. Then remove the top most tip that is labeled as "B". Then, just below that, remove the part that is labeled as "1". (I call it Part-1) Now push the long nozzle out of part -1 which has a washer inside it. Washer comes out and then you slide the new nozzle into the Part-1. Put the washer back into Part-1 and finally screw Part-1 back on the wand. Hope this helps.
Read Less
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Asked by
Brookfield, MO, USA
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February 1, 2014
Answer: 
When you have it in hand simply use the tip you need. Nothing to changing them.
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February 1, 2014
Answer: 
Mine is a MS-401. It came with one nozzle and it just screws on.
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Asked by
Rosenberg, Greater Houston
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February 1, 2014
Answer: 
I used the sprayer as it came in from factory, with no extra nozzles attached, and found that it performed best for me. Adding the nozzles changes the spray patterns. You can add the nozzles one at a time, at the spray end, by removing the twist spray tip. You can add one flat nozzle by the handle, by disconnecting the spray wand. It is all trial and error, and what you like it.
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Asked by
Lakeview, OR 97630, USA
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January 20, 2014
Answer: 
Unscrew the biggest black plastic part (#592 in the instructions) on the end of the wand then unscrew the adjustable tip push back thur the big plastic part don't lose the round gasket then install the new tip followed by the gasket.
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This question is from 4 Gal. Diaphragm Backpack Sprayer
 
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This unit comes with four tips for sprayer. How do you change them?

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East Hanover
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January 12, 2014
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Answers (11)

Asked by
New Mexico, USA
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February 22, 2014
Answer: 
The three adapters fit inside the main nozzle. Use one at a time or use it without an adapter
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Asked by
North West, Loudoun Virginia
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February 3, 2014
Answer: 
Follow the directions in attached picture
User submitted photo
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February 3, 2014
Answer: 
Unscrew the variable spray tip and then remove the black rubber washer from the retaining nut. I gently pried the washer out with a small screwdriver. With the washer removed, push the spray tip out of the securing nut. It will take a little bit of pressure to do this. With the spray tip removed from the retaining nut, you can drop the fixed spray nozzles into the nut, then the washer and reassemble.
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Asked by
Wellsville, NY
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February 2, 2014
Answer: 
The "nut" that holds the adjustable nozzle to the wand is removable - just hold the adjustable nozzle in one hand and push up on the nut, wiggling to dislodge the rubber washer holding the nozzle in place.
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Asked by
Virginia, USA
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Home Improvement Profile: DIYer
February 1, 2014
Answer: 
You have to completely dis-assemble manual's part 592.
So if you are holding the wand with factory installed nozzle. Then remove the top most tip that is labeled as "B". Then, just below that, remove the part that is labeled as "1". (I call it Part-1) Now push the long nozzle out of part -1 which has a washer inside it. Washer comes out and then you slide the new nozzle into the Part-1. Put the washer
Read More
You have to completely dis-assemble manual's part 592.
So if you are holding the wand with factory installed nozzle. Then remove the top most tip that is labeled as "B". Then, just below that, remove the part that is labeled as "1". (I call it Part-1) Now push the long nozzle out of part -1 which has a washer inside it. Washer comes out and then you slide the new nozzle into the Part-1. Put the washer back into Part-1 and finally screw Part-1 back on the wand. Hope this helps.
Read Less
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Asked by
Brookfield, MO, USA
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February 1, 2014
Answer: 
Change by inserting a tip in/on the end of the hose. Piece of cake
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February 1, 2014
Answer: 
Mine is a MS-401. It came with one nozzle and it just screws on.
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Asked by
Rosenberg, Greater Houston
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Home Improvement Profile: DIYer
February 1, 2014
Answer: 
I used the sprayer as it came in from factory, with no extra nozzles attached, and found that it performed best for me. Adding the nozzles changes the spray patterns. You can add the nozzles one at a time, at the spray end, by removing the twist spray tip. You can add one flat nozzle by the handle, by disconnecting the spray wand. It is all trial and error, and what you like it.
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January 31, 2014
Answer: 
There is a small black piece that screws onto the end of the wand after the little bend. You put the little round adaptor inside that black piece before you screw it onto the wand. It doesn't matter which way you put in the black circular pieces so long as they're flush. The little blue adator I put in with flat surface facing the wand. The little adaptors don't screw in so hold downwards with wand above Read More
There is a small black piece that screws onto the end of the wand after the little bend. You put the little round adaptor inside that black piece before you screw it onto the wand. It doesn't matter which way you put in the black circular pieces so long as they're flush. The little blue adator I put in with flat surface facing the wand. The little adaptors don't screw in so hold downwards with wand above to keep it from falling out while you're screwing on the end piece. Read Less
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January 22, 2014
Answer: 
See diagram I uploaded. Disassemble existing nozzle (unscrew adjustable poly cone nozzle cap). Unscrew retaining nut. Follow diagram for reassembly.
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Asked by
Atlanta, GA
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January 17, 2014
Answer: 
Hi salosenior,
I'm Travis from The Home Depot. Thanks for visiting our site.
The spray wand will disassemble for cleaning and to change spray tips for different spray patterns.
To change nozzles, unscrew the retaining nut that holds the nozzle to the wand. Grasp the largest nut behind the tip and unscrew it, counterclockwise. Do not use tools. It will unscrew by hand.
If necessary, soak the tip in Read More
Hi salosenior,
I'm Travis from The Home Depot. Thanks for visiting our site.
The spray wand will disassemble for cleaning and to change spray tips for different spray patterns.
To change nozzles, unscrew the retaining nut that holds the nozzle to the wand. Grasp the largest nut behind the tip and unscrew it, counterclockwise. Do not use tools. It will unscrew by hand.
If necessary, soak the tip in warm water to loosen the threads.
Replace the nozzle with a different one and tighten the nut to change the spray pattern.
The nozzle fitted in the picture is an adjustable spray, from stream to mist. Other patterns include a flat fan and cone pattern nozzles.
Thank you for asking!
Travis Read Less
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This question is from 4 Gal. Diaphragm Backpack Sprayer
 
7 answers

how far will the sprayer spray the fluid?

This question is from 4 Gal. Diaphragm Backpack Sprayer
Asked by
suffolk,Virginia
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April 6, 2014
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Answers (7)

Asked by
East Hanover, NJ, USA
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October 6, 2014
Answer: 
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.
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Asked by
Northern Utah
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October 6, 2014
Answer: 
It depends on how you have the nozzle set. If you have it at full spray, it doesn't spray very far - maybe 1-3 feet. If you turn the nozzle all the way to the open spray, you can probably spray 10-12 feet or more. This also will depend on what liquid you are spraying and how well you have the tank pressurized.
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June 23, 2014
Answer: 
Est. is 8 feet
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Asked by
North West, Loudoun Virginia
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June 19, 2014
Answer: 
It comes with three different nozzels. With jet spray attachment, spray can go as far as 15-20 feet
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Asked by
Woodstock GA
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May 20, 2014
Answer: 
I have been able to get around 10-12' with no wind and using the single stream setting. Hope this helps with your decision
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Asked by
Utah
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April 22, 2014
Answer: 
my experience is about 6 feet away from me.
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Asked by
New Mexico, USA
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April 7, 2014
Answer: 
That depends upon which nozzle you use and how much pressure you build up. 6 to 8 ft, certainly. Here in the desert the air is so dry that a lot is lost to evaporation. We see rain falling from clouds and stopping halfway to the ground, called virga.
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This question is from 4 Gal. Diaphragm Backpack Sprayer
 
6 answers

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

This question is from 4 Gal. Diaphragm Backpack Sprayer
Asked by
west granby ct
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October 10, 2014
piston sprayer. please explain the difference between the two
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Answers (6)

Asked by
Boston
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April 26, 2015
Answer: 
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.
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Asked by
Georgia
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February 11, 2015
Answer: 
the diaphragm will handle powders but has less PSI. However, it will not handle bleach like the Solo. Solo is a much better product.
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Asked by
Northern Utah
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October 13, 2014
Answer: 
Piston sprayer uses a piston technology, much like that of the pistons in a car engine. As you pump the piston within the enclosed chamber, it builds pressure that forces the fluid into the hose of the sprayer. This is the conventional way most sprayers have been manufactured for years. The diaphragm on the other hand has a diaphragm that is used to build the pressure when you manipulate the pump, which Read More
Piston sprayer uses a piston technology, much like that of the pistons in a car engine. As you pump the piston within the enclosed chamber, it builds pressure that forces the fluid into the hose of the sprayer. This is the conventional way most sprayers have been manufactured for years. The diaphragm on the other hand has a diaphragm that is used to build the pressure when you manipulate the pump, which forces the liquid out of the hose.
Piston sprayers are not designed to handle abrasive chemicals, which can damage the piston cylinder. Diaphragm pumps allow small abrasive particles pass, without any damage to the pump. Some commonly used chemicals are considered abrasive. Diaphragm pumps will also hold up better to chemical residue left behind in the sprayer.
I have used both, and I feel very highly of the diaphragm technology. Read Less
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Asked by
East Hanover, NJ, USA
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October 12, 2014
Answer: 
I chose the diaphragm pump for my use because I understood the pumping chamber would not be contaminated with my chemical mixture, where the piston pump mixes air and chemical mixture inside the piston chamber.
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Asked by
New Mexico, USA
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October 12, 2014
Answer: 
The piston sprayer is less suitable for spraying suspensions- liquids that contains small floating particles. Since the fertilizers that I spray are slow to dissolve, I chose the diaphragm sprayer and I'm very happy with it.
Possibly the piston sprayer would take less work to pump, since all your effort is going into moving the fluid rather some of it pushing against the diaphragm. The only way to know Read More
The piston sprayer is less suitable for spraying suspensions- liquids that contains small floating particles. Since the fertilizers that I spray are slow to dissolve, I chose the diaphragm sprayer and I'm very happy with it.
Possibly the piston sprayer would take less work to pump, since all your effort is going into moving the fluid rather some of it pushing against the diaphragm. The only way to know this for sure is to do a side by side comparison. I'm not too worried though, my sprayer is so much easier to use than my old one that needed constant refilling and the hassle of dragging around hoses. Read Less
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Asked by
Las Cruces,NM
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October 12, 2014
Answer: 
Piston is more dependable and takes less effort to pump
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Customer Reviews

Rated 4.3 out of 5 by 80 reviewers.
Rated 1.0 out of 5.0 by 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. August 5, 2016
Rated 5.0 out of 5.0 by 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. September 6, 2016
Rated 5.0 out of 5.0 by Glad I made this purchase This product is very user friendly. I have acreage that weeds take over if not controlled. This little sprayer is just the right size and performs great. August 9, 2016
Rated 5.0 out of 5.0 by Purchased for house use great so far we are thankful we were able to purchase it July 5, 2016
Rated 4.0 out of 5.0 by Very good product compared to others that I reviewed on the Internet Solo and other brands were pretty badly reviewed on the Internet. Many said that the straps were weak and that the diaphragm failed soon after purchase. This sprayer has excellent straps and is comfortable to wear. It works well. The only issue I have is the pump handle makes a clicking noise each time I pump it. I have not isolated where the noise is coming from yet. It does not seem to interfere with the operation of the sprayer so far. May 31, 2016
Rated 3.0 out of 5.0 by To uncomfortable to wear (woman) Well, this is an odd review. I was VERY excited about buying this product but it goes back today. After spending an hour with the straps. I gave up. Being a woman with a shorter frame and narrower shoulders I could see this thing was determined to fall off of my shoulders even moving the lower plastic piece. It would be so easy to design this like the old aluminum frame backpacks (I have one) with a real HIP belt and having a clevis pin attachment on the lower frame. A sternum strap and curved shoulder straps like newer backpacks would also help make it more comfortable. I think for the majority of men who are the main market, this would work well. I am very much disappointed as it looks to be a very nice quality product and the wand has a great feel. May 14, 2016
Rated 5.0 out of 5.0 by 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. May 18, 2016
Rated 5.0 out of 5.0 by Backpack sprayer Makes a spraying job so much easier. You don't have to hold it or pump it the way bottle sprayers work. Easy to handle and much larger capacity. June 7, 2016
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