Ketchup on Halloween deals

View Deals
Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
forum threadtunabreath posted Today 08:58 AM
forum threadtunabreath posted Today 08:58 AM

Harbor Freight coupon, GREENWOOD 4 Gallon Backpack Sprayer for $19.99 (33% off)

$20

Harbor Freight
10 Comments 1,262 Views
Get Deal at Harbor Freight
Good Deal
Save
Share
Deal Details
Harbor Freight has GREENWOOD 4 Gallon Backpack Sprayer for $19.99 when you present coupon below.

https://go.harborfreight.com/coup...100-63092/

Item information:
https://www.harborfreight.com/4-g...gn=cpnlink
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Harbor Freight has GREENWOOD 4 Gallon Backpack Sprayer for $19.99 when you present coupon below.

https://go.harborfreight.com/coup...100-63092/

Item information:
https://www.harborfreight.com/4-g...gn=cpnlink

Community Voting

Deal Score
+5
Good Deal
Get Deal at Harbor Freight

Leave a Comment

Unregistered (You)

10 Comments

Sign up for a Slickdeals account to remove this ad.

Today 10:38 AM
710 Posts
Joined May 2013
CouponFinder99Today 10:38 AM
710 Posts
I bought this thing and hated it. Super uncomfortable.
Today 01:55 PM
53 Posts
Joined Nov 2010
aziankingzToday 01:55 PM
53 Posts
Quote from CouponFinder99 :
I bought this thing and hated it. Super uncomfortable.
Is the pressure strong enough to wash a car or is it just for watering plants?
Today 02:16 PM
1,876 Posts
Joined Aug 2011
Joseph06Today 02:16 PM
1,876 Posts
It works until the wand splits down the middle
Pro
Today 02:27 PM
1,701 Posts
Joined Feb 2011
jongasse
Pro
Today 02:27 PM
1,701 Posts
Hard pass specially if you will be using this to spray chemicals like herbicides and insecticides because those will end up on your face and body with this. Super dangerous. Search on amazon for battery operated ones for $40-$60 that will be a world of difference
Pro
Today 02:29 PM
1,701 Posts
Joined Feb 2011
jongasse
Pro
Today 02:29 PM
1,701 Posts
Quote from aziankingz :
Is the pressure strong enough to wash a car or is it just for watering plants?
You need a $50 pressure washer to wash a car. This will mist your windshield - it's like a little kid pissing, not even an adult.
1
Pro
Today 02:29 PM
39,284 Posts
Joined Nov 2005
Dr. J
Pro
Today 02:29 PM
39,284 Posts
Quote from aziankingz :
Is the pressure strong enough to wash a car or is it just for watering plants?
It's 4 gallons, it would be super impractical to really wash anything with this. It's intended for spraying chemicals/pesticides/etc and I wouldn't use it for any situation that would require large volumes.

For my use case I bought one years ago for applying pesticide around the perimeter of my property because a 1 gallon one was too small. Being able to continuously pump and spray is a huge timesaver but is only practical for large applications.

That said although I still have one of these and it works just fine, I've moved over to a battery sprayer which gives you a much better and consistent spray pattern. I have one of the Bauer models that HF discontinued because it was prone to leaks (it's a very simple setup and an average DIYer can fix that situation). I bought it primarily because the Bauer battery line is compatible with Dewalt batteries with some basic mods (cut out some plastic pieces). Works great.
Today 03:03 PM
53 Posts
Joined Nov 2010
aziankingzToday 03:03 PM
53 Posts
Quote from jongasse :

You need a $50 pressure washer to wash a car. This will mist your windshield - it's like a little kid pissing, not even an adult.
OK Thanks, i will look at other options. Just need something that can quickly rinse a car with soap water during the winter without a hose and power outlet.

Sign up for a Slickdeals account to remove this ad.

Pro
Today 03:11 PM
1,701 Posts
Joined Feb 2011
jongasse
Pro
Today 03:11 PM
1,701 Posts
Quote from aziankingz :
OK Thanks, i will look at other options. Just need something that can quickly rinse a car with soap water during the winter without a hose and power outlet.
Hmm, I wonder how those mobile detailing one-main operations in a van do it. Never looked into it
Pro
Today 03:21 PM
39,284 Posts
Joined Nov 2005
Dr. J
Pro
Today 03:21 PM
39,284 Posts
Quote from jongasse :
Hmm, I wonder how those mobile detailing one-main operations in a van do it. Never looked into it
Use customer water/hose, or haul a tank with water in it and be super judicious with usage.

you could stuff it all in the back of a large van or just outfit a trailer like this:

[IMG]https://i.pinimg.com/736x/05/ac/83/05ac83ba890557a0eced3dc18f693789.jpg[/IMG]

The main problem is water is extremely heavy. IBC totes like seen in the image hold 300-500 gals in which case just the water in the tote will weigh 2500 - 4000 lbs not including the IBC itself and all the ancillary equipment which means you need a pretty beefy trailer. The specific tote in the image holds 90 gals which will be more like 750 lb but will limit how many washes you can do before refilling. (for reference google is telling me a carwash at home will use 40-140 gallons so let's say the average is 90 - meaning the setup in the image will only be good for around 1 wash)
Last edited by Dr. J October 28, 2025 at 08:26 AM.
Pro
Today 03:31 PM
1,701 Posts
Joined Feb 2011
jongasse
Pro
Today 03:31 PM
1,701 Posts
Quote from Dr. J :
Use customer water/hose, or haul a tank with water in it and be super judicious with usage.

you could stuff it all in the back of a large van or just outfit a trailer like this:

[IMG]https://i.pinimg.com/736x/05/ac/83/05ac83ba890557a0eced3dc18f693789.jpg[/IMG]

The main problem is water is extremely heavy. IBC totes like seen in the image hold 300-500 gals in which case just the water in the tote will weigh 2500 - 4000 lbs not including the IBC itself and all the ancillary equipment which means you need a pretty beefy trailer. The specific tote in the image holds 90 gals which will be more like 750 lb but will limit how many washes you can do before refilling. (for reference google is telling me a carwash at home will use 40-140 gallons so let's say the average is 90 - meaning the setup in the image will only be good for around 1 wash)
No, there are these single person operations where this guy just washes multiple cars in a parking lot and drives a little van that he moved next to the car he's washing and detailing.

There are 3 options:

1. He's stealing water from the irrigation lines of the parking lot
2. He has some equipment that recycles the used, dirty water
3. He's super skilled in washing the cars with very little water

Probably the second because I don't see much runoff from his washing and I observed him clean one day and he wasn't being stingy.

When I wash my own car, I use around 40-50 gallons and my driveway is overflowing with water as if it was a murder scene.

Leave a Comment

Unregistered (You)

Popular Deals

View All

Trending Deals

View All