Chapin Mixes On Exit ATV Sprayer System, 25-Gal. Capacity, 2.5 GPM, Model# 97561

I read all of the previous reviews, so I was prepared to have to tighten loose fittings and hose clamps. But when I unpacked my unit, everything was in good shape, and the minor assembly required went without a hitch. I mounted the sprayer to my John Deere 1025R tractor to a front end fork-lift attachment. It was easy to just pop the hood and attach the jumper cable clamps to the battery to power the sprayer's pump. The attached sprayer's hose was long enough to reach to the riders seat on the tractor, and spray to the right and left of the tractor.I put my concentration into the small tank, and filled up the water tank with 15 gallons. I used the sprayer to spray herbicide on my property. The sprayer had enough pressure to reach about 15+ feet from the tractor. The sprayer worked like a champ and I had no problems while using all 15 gallons of water.In summary, the sprayer was easy to assemble, works well on tractors too, and met and exceeded my expectations. I would recommend this product.

This is my one year review for the Chapin post mix 25 gallon sprayer. We have 7+ acres that were overrun with an invasive weed two years ago. We bought this system because the ability to change out chemicals with no waste made sense. In the areas were we didn't want anything growing we used a ground clear product and when spraying around trees and bushes that we wanted to keep, we changed out to a pre-emergent. We did use a second chemical tank as it was a bit messy to drain and refill the small tank with different chemicals. We had a manufacture defect that Chapin customer service quickly resolved. They really impressed us with their service after the sale!I will share some tips for working large areas with this sprayer. We purchased a wider spray tip (blue fan tip from Tractor Supply) and added a 50' heavy duty air compressor hose to extend the distance we could get from the tank system. The pump had no problem keeping up with additional hose and this allowed us to work a lot of hard to reach areas without moving the tank. We just completed our second year of chemical application with no issues from the sprayer plus it looks like we are winning the weed wars!Bottom line is this $250 purchase was money well spent. The unique design and customer service from Chapin make this a sprayer that we recommend very highly!

The basic design of this system is good but it does require some modification. It mixes pretty well and the pump has plenty of power. The first mod is the drain plug. I read about its problems with leakage in the comments before I bought the machine and bought a brass hose valve w/shutoff with the machine. Doesn't leak. It actually mixes pretty well. Not perfect and not exactly as the scale would indicate but usable and far better than mixing insecticides. My mixing valve did leak. There is nothing securing the incoming mixing hose to the mixing valve so don't pull it and you might want to disassemble is initially to make sure that it is seated fully. ALWAYS put it back to -ZERO- when you are finished or it will gravity feed. The mixing valve screws are already rusting after a month so I will probably replace them with stainless ones. The power switch looks like the waterproof switch you would expect to be on an ATV destined device. IT IS NOT! It is a simple 110v POS switch in a housing that isn't water sealed. Mine corroded away in a month. Just bought a 12v, waterproof, standalone switch for a few dollars on Amazon to fix it. All in all, I like this system once you fix the simple, inexpensive shortcuts the manufacturer took to save a few dollars. I'm confident that Chapin is spending more in customer support and warranty work than these fixes would have cost to be made right in the first place.

7/24/20- update... I have now used this several times and have tried every setting to adjust the flow of the poison to mix appropriate. I am using just basic round up in the mix tank but it still does not mix the proper ratio. I now have it set to setting 7 which is approx 15oz per gallon. I sprayed 25 gallons of water and the mix tank only distributed approx 10-15oz.I just cannot get this system to work and would strongly advised against purchasing one. You can save money and headache by just buying a standard tank and manually mixing.I have also made multiple calls to the company and they have been of no assistance. They did ship me a new mixing valve (that didn’t work) and after calling back with results, I was told there is nothing else they know to do. I have lowered this review to 1 star because not only is the product faulty, but service was no better.I normally do not write negative reviews because I understand that there can be a lemon in every bunch. I will start with saying, the idea behind this product is outstanding. I was attracted to the idea of switching out the concentrate tanks without having to clean the main tank each time. This idea of auto mixing was great, but the execution is not good and that leads me into the remaining part of this review.I am not saying to not buy this product because for some it may work just fine, however for me and my situation it does not and here is why.The initial setup is fairly easy with minimal screw connections. I do recommend you check or tighten every screw and hose adapter as mine seem to all be loose. Even after my first round of tightening the connections, I still had several leaks from different areas. I was finally able to get it all leak free but not before lots of dissassembly and reassembly.After I got it all setup, I filled my concentrate tank with two gallons of generic round up and 25 gallons of water in the main tank. I sprayed my entire property and emptied the water tank which should have lowered my concentrate tank by at least 2/3rds considering i was on a 3/oz per gallon ratio. My concentrate tank remained nearly full. I could tell the it was pulling poison in to mix, just not at the right ratio.I disassembled every component, cleaned and checked all hoses for kinks and other issues and could find none. I called Chapin and the lady kindly sent me an entire new mix valve and hoses to try.After assembly of the replacement valves I attempted it all again. Again, the same thing happened that all the water was sprayed but still a fairly full tank of poison. I called Chapin again and the lady I spoke to said she has heard of this before with round up and other thicker liquids than water and that there is a email they can send that helps "recalibrate". The instructions as as follows...MOE ATV testing instructions1. Fill water tank about half way with water2. Fill chemical tank with chemical you wish to use – tighten cap3. Turn on unit and adjust flow to optimize and remove any air in the lines(spray into a bucket or an area that is OK with the chemical)4. Turn off unit5. Remove the chemical tank and weigh it – record weight in pounds6. Re-attach chemical tank7. Set dial to desired setting8. Turn unit back on9. Spray into 1 gallon container like a milk container until full10. Re-weigh chemical tank – record weight in pounds11. Subtract this 2nd weight from 1st weight - this is the amount of chemical in pounds used in 1 gallon12. Take this value and multiple by 16 to get ounces/gallon13. If this value is not desired turn the dial to a higher or lower number and repeatSo after many assemblies and disassemblies, 50+ gallons of water in trial, hours spent spraying and working on the unit. I cannot say this is worth purchasing. I feel I would have been better spending my money on a regular tank without all the things attached that will fail. Even though this seems to have a good pump and sprays a good stream, the same can be said for cheaper sprayer pump setups from your local stores.I highly recommend reading other reviews listed on here as I experience the same issues and more. I am not mad by any means, just disappointed this product is not working as described. I really wish it worked as it would make life so much simplier.Again, I wish the best for Chapin and this product, but I will not be a return customer and will end up just pouring my mixing solution in the main tank and using it as any other tank design. If anything changes in the future, I will edit this post to reflect the changes.**for all the people out there that will say to just turn the dial to a higher ratio, while this might work, I for one, do not think I should have to do that when spending $200 for a product that is supposed to do it for me, and two, I do not want to "test" ratio mixes with my concentrate that is not cheap.