Im going to try this but with a windshield fluid pump. They are cheaper at junkyards and should have enough pressure. Just need to either use a 12v battery or reduce the voltage to 12 to 14 volts.
Hey Jeff thanks for the inspiration. I built one of these after watching your vid. I have a 40 psi pump and was getting a surge/pulsating. I tried several things and was suspecting a bad pump. I installed a water shut off valve on the incoming side. Turned it to almost closed. Boom, problem solve. Works like charm now. Thanks again for the idea.
Fantastic! Glad you got it sorted out. I suspected the internal check valve is defective. Limiting the incoming flow must provide enough back pressure to fully prime the pump.
great video. one thought. you mentioned at the upper 100psi setting the atomization. This might be perfect if putting out pesticide for mosquitoes in land scape. Kind of same effect of the back pack sprayers with built in tanks for pesticides.
Thank you so very much. This is exactly what I need I think I am a handy guy just need a little direction to start. This will be used by dad to keep there daughter safe from undesirable scum. If you so desire I will keep you updated. It will be “ the make the streets safer 3,000”
I very much appreciate your video! I was hoping so badly that someone had taken this journey before me to pave the way. I am currently building pretty much the same setup as yours here but to save money I've designed and 3d printed a few parts like a flat piece (6mm x 71.2mm) to work with the existing salvaged black screw cap with a small hole in the center to tightly fit the tubing I got from home depot and a crosshair style end piece for that tube so it doesn't get stuck flush against the bottom in the tank. I can upload the STL files somewhere if anybody wants them. I am also going to be using 6 x 21700 Li-Ion cells in a 3s2p configuration that I have left over from an ebike battery build to create a 10.8V (nominal) battery pack. I also have the STL file I designed for the battery enclosure I am printing as I am typing this. I tested the pump and sprayer with water and a variable power supply at 11V ~3.5A and it seemed like it flowed nicely so I figure as long as I keep the battery charge above 40-50% it should have plenty of power. I will be putting a standard on/off switch for when it is not in use so that I don't have to disconnect anything but it seems to be doing ok and operating based off the regular wand trigger with the pressure switch turned down a good 1-1.5 turns counter clockwise. I have not tested it in the real world yet though, so some of this might be inaccurate after further testing. If so, I will update.
@@jeffakamax I printed everything in PLA+ for now because it's what I had loaded and was going to do the final in PETG but at this point I think I'll just run with the PLA+ and see how long it holds up.
Hey friend great job. I have a hand pump Chapin I want to convert. It has a bladder type pump system that comes through the bottom. Not sure it's removable. The wand hose comes out the bottom. Do you think I could leave all that in place and rig your pump set up via the hose from the bottom?
It is. My only concern with a momentary switch is that by simultaneously pushing the valve & the power switch there is going to be a second or two until the pressure builds giving an inconsistent spray pattern. Might be an issue depending n what you're spraying.
Nice modification, Jeff 👍 is it better use li-ion battery than the Accu? Does Makita 12Volt 1,5AH li-ion battery can do enough just for 1 hour spraying?
Gotta ask cause I’m a naive to this sorta stuff. But assuming your pump in the build was working correctly and shut off when ever the pressure was reached, would it ever need an on switch or does the pump just start on its own the instant that you plug the power source (or in this case a 12v battery on it) ? seen quite a few other examples with on switches, is it really necessary? Also, do you worry about over discharge of the battery? Or do you just figure you’ll never use the pump that long that it would ever actually get close to completely draining the battery?
A switch is needed for example when the tank runs empty you can shut it off so it doesn't run constantly. Lithium battery packs have a BMS. Battery management system which will stop the batteries from discharging below a voltage that could damage them.
@@jeffakamax gotcha, so as long as I keep an eye on when the tank is low and don’t plan on running the pump dry endlessly, I don’t really HAVE to install an on and off switch?
@@jeffakamax gotcha, so as long as I keep an eye on when the tank is low and don’t plan on running the pump dry endlessly, I don’t really HAVE to install an on and off switch?
@@jeffakamax I’ve got a ryobi 18v extra battery in the garage. Sounds like it may burn up the motor. But I think I’ll send it. Worst case scenario, I’m out of an $18 pump. And then maybe I’ll consider a resistor. Or a 12v like yours. Thanks!
umm..... if you get the extended warranty for the harbor freight sprayer it is not returnable. you have to fill out the online form and they either issue you credit or send you another one. hmmmmm
11:19 "How you staple a 400 dollar priced tag on that is beyond me".... Capitalism is how. It's not enough to make 100% profit. These greedy fkers have to make a 2 and 300% profit. Greed has no limit
Im going to try this but with a windshield fluid pump. They are cheaper at junkyards and should have enough pressure. Just need to either use a 12v battery or reduce the voltage to 12 to 14 volts.
Fantastic mod, Jeff. Nice job. Thanks for sharing.
Hey Jeff thanks for the inspiration. I built one of these after watching your vid. I have a 40 psi pump and was getting a surge/pulsating. I tried several things and was suspecting a bad pump. I installed a water shut off valve on the incoming side. Turned it to almost closed. Boom, problem solve. Works like charm now.
Thanks again for the idea.
Fantastic! Glad you got it sorted out. I suspected the internal check valve is defective. Limiting the incoming flow must provide enough back pressure to fully prime the pump.
It would be great if you can do a full video of how you built it. I really want to try it out myself. Thank you for the video.
Why? If you cant figure it out from looking at this video maybe you shouldn’t try to build it. Its so simple.
great video. one thought. you mentioned at the upper 100psi setting the atomization. This might be perfect if putting out pesticide for mosquitoes in land scape. Kind of same effect of the back pack sprayers with built in tanks for pesticides.
a link for the pump would be great.
Thank you so very much. This is exactly what I need I think I am a handy guy just need a little direction to start. This will be used by dad to keep there daughter safe from undesirable scum. If you so desire I will keep you updated. It will be “ the make the streets safer 3,000”
I very much appreciate your video! I was hoping so badly that someone had taken this journey before me to pave the way. I am currently building pretty much the same setup as yours here but to save money I've designed and 3d printed a few parts like a flat piece (6mm x 71.2mm) to work with the existing salvaged black screw cap with a small hole in the center to tightly fit the tubing I got from home depot and a crosshair style end piece for that tube so it doesn't get stuck flush against the bottom in the tank. I can upload the STL files somewhere if anybody wants them. I am also going to be using 6 x 21700 Li-Ion cells in a 3s2p configuration that I have left over from an ebike battery build to create a 10.8V (nominal) battery pack. I also have the STL file I designed for the battery enclosure I am printing as I am typing this. I tested the pump and sprayer with water and a variable power supply at 11V ~3.5A and it seemed like it flowed nicely so I figure as long as I keep the battery charge above 40-50% it should have plenty of power. I will be putting a standard on/off switch for when it is not in use so that I don't have to disconnect anything but it seems to be doing ok and operating based off the regular wand trigger with the pressure switch turned down a good 1-1.5 turns counter clockwise. I have not tested it in the real world yet though, so some of this might be inaccurate after further testing. If so, I will update.
You shouldn't have any voltage issues as li-ion hold voltage until they dump. Are you using PETG for the cap insert? Keep me posted!
@@jeffakamax I printed everything in PLA+ for now because it's what I had loaded and was going to do the final in PETG but at this point I think I'll just run with the PLA+ and see how long it holds up.
Thanks for the idea. Made one and it works. How’s the pump holding up?
so far, so good
Would like too make one, need what parts you ordered.
Awesome mod! Is it possible to put the links of the parts in the description? Thanks
Great video, thank you. Where did you purchase your pump from?
Amazon
Bro you should build and sell those for $200 😂 👍🏽
So you got herbicide in the cleaner one and bleach in the one marked roundup?
Are they color coded or something?
They look completely different. Easy to tell apart.
Genius
Looking to do this build. I a ryobi sprayer that leaks. Wanted a chapin but they break.
I've had good luck so far with my Chapin, we will see how it holds up this summer.
Hey friend great job. I have a hand pump Chapin I want to convert. It has a bladder type pump system that comes through the bottom. Not sure it's removable. The wand hose comes out the bottom. Do you think I could leave all that in place and rig your pump set up via the hose from the bottom?
If fluid will free flow from the hose, absolutely!
Can i use a 18v batter on this 12v pump?
Probably....
nice, i've been thinking about using a cheap 10$ 12v fuel pump
they don't have the flow volume and pulse (especially the cheap ones) but it depends on your expectations
Is it possible to put the power switch (spring action) in the handle of the wand? To make it operate when pressing the handle .
It is. My only concern with a momentary switch is that by simultaneously pushing the valve & the power switch there is going to be a second or two until the pressure builds giving an inconsistent spray pattern. Might be an issue depending n what you're spraying.
@@jeffakamax Thank you 👍
Nice modification, Jeff 👍 is it better use li-ion battery than the Accu? Does Makita 12Volt 1,5AH li-ion battery can do enough just for 1 hour spraying?
Lithium ion work great. You should get 3 or 4 tanks from a 1.5 ah battery depending on the pump you use.
@@jeffakamax ok thank you 🙏 🙂
Gotta ask cause I’m a naive to this sorta stuff. But assuming your pump in the build was working correctly and shut off when ever the pressure was reached, would it ever need an on switch or does the pump just start on its own the instant that you plug the power source (or in this case a 12v battery on it) ? seen quite a few other examples with on switches, is it really necessary?
Also, do you worry about over discharge of the battery? Or do you just figure you’ll never use the pump that long that it would ever actually get close to completely draining the battery?
A switch is needed for example when the tank runs empty you can shut it off so it doesn't run constantly. Lithium battery packs have a BMS. Battery management system which will stop the batteries from discharging below a voltage that could damage them.
@@jeffakamax gotcha, so as long as I keep an eye on when the tank is low and don’t plan on running the pump dry endlessly, I don’t really HAVE to install an on and off switch?
@@jeffakamax gotcha, so as long as I keep an eye on when the tank is low and don’t plan on running the pump dry endlessly, I don’t really HAVE to install an on and off switch?
Correct
I’m no electrician. But isn’t that a 20v battery? Ok to use on a 12v pump?
Dewalt 20v packs are only 18v at peak. The ones im using are 12v
@@jeffakamax I’ve got a ryobi 18v extra battery in the garage. Sounds like it may burn up the motor. But I think I’ll send it. Worst case scenario, I’m out of an $18 pump. And then maybe I’ll consider a resistor. Or a 12v like yours. Thanks!
Fantastic 👌
umm..... if you get the extended warranty for the harbor freight sprayer it is not returnable. you have to fill out the online form and they either issue you credit or send you another one. hmmmmm
I've never paid for a warranty for anything from HF let alone a cheap $30 sprayer.
@@jeffakamax hint hint
11:19 "How you staple a 400 dollar priced tag on that is beyond me".... Capitalism is how. It's not enough to make 100% profit. These greedy fkers have to make a 2 and 300% profit. Greed has no limit