Chapin International Replacement Tank

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!

This unit works perfectly to allow me to provide effective weed control by boom or wand. I mounted it on a wooden sled that slides into the yard trailer. I found the drain to be problematic but replaced the cheap plastic cap with a brass 1” ball valve and no more drips. I have a second tank for concentrate that I have filled with water for rinsing after spraying. Keeping the unit filled with water maintains the prime and it takes just a minute to swap the pony tank, set the mix ratio and get spraying. As soon as spraying is done, the pony tank with water is returned and the lines are rinsed. So far I have no issues and the mixing unit appears to be working well. I can raise the boom level for running through the pastures or lower down to spray the lawn. I am quite pleased with the unit as it works well and the pony tank avoids the need to rinse the big tank after spraying.

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 instructions 1. Fill water tank about half way with water 2. Fill chemical tank with chemical you wish to use – tighten cap 3. 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 unit 5. Remove the chemical tank and weigh it – record weight in pounds 6. Re-attach chemical tank 7. Set dial to desired setting 8. Turn unit back on 9. Spray into 1 gallon container like a milk container until full 10. Re-weigh chemical tank – record weight in pounds 11. Subtract this 2nd weight from 1st weight - this is the amount of chemical in pounds used in 1 gallon 12. Take this value and multiple by 16 to get ounces/gallon 13. If this value is not desired turn the dial to a higher or lower number and repeat So 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.

Works great overall. I would buy again if needed. I put water with some dye in the chemical tank, filled the 25 gallon tank with water. Pulled behind a sxs using a boom sprayer and the included wand. Somehow the dyed water ended up in the big tank. I don't think this is how it is supposed to work. The pump worked great, priming went well, and it worked as described. The drain on the 25g tank is at the very bottom on the end, if the tank is placed on a flat surface like a garage floor, it will leak. In the bed of my sxs, I had to build a 2x4 platform to keep it from just leaking from the drain. That was the biggest issue. I'd buy again if needed another tank sprayer.

Chapin gets poor marks for packaging. The trigger mechanism for the spray wand has a small delicate plastic clip to lock the trigger in the open position. Since the trigger was not secured in the box, the clip was crushed by the weight of the tank.