Price: $109.99 - $93.49
(as of Dec 17, 2024 17:57:09 UTC - Details)

CHAPIN hydrofeed fertilizer injectors feature a patent-pending design for use with drip irrigation, sprinkler, Soaker hose & direct hose spray applications. Mixes water with liquid, granular & fish emulsion products at the water source. The 2 gallon 4720 model has a Translucent tank for easy monitoring of usage, a large opening for easy filling, & a variable rate adjustment to allow between 1 & 10 oz of product flowper gallon. A rigid inlet tube with in-tank filter for debris-free mixing & drain with valve to quickly empty remaining product & water from the tank provide for simple & easy maintenance. The CHAPIN hydrofeed line is a great way to conserve water & still have a lush, green, well-fed landscape or garden.
2 gallon tank with large 4-inch opening for easy filling
Variable Rate adjustment allows for 1 to 10 oz. Of product per gallon
Translucent tank for monitoring usage
Ideal for use with liquid or granular concentrates and/or fish emulsion applications
Easily connects to hose spigot or irrigation system with standard hose fittings
Rigid inlet tube with filter for debris-free mixing and drain plug with valve to quickly empty the tank after each use
Reviewer: Classic
Rating: 5.0 out of 5 stars
Title: Excellent product. Fantastic customer service.
Review: It worked quite well in delivering the fertilizer to the irrigation, but then developed a crack and as a result leaked. Customer service resolved it right away. Now up and running no prob.I suggest isolating it from your main irrigation line with a diverter and valves - only allow water flow through it when you want to fertilizer. Will likely extend the life.

Reviewer: Dude
Rating: 1.0 out of 5 stars
Title: Works great for home gardens (1 year update)
Review: I use the inline fertigator with a timer and drip lines. Worked great for my needs. I keep it covered away from direct sun (it is plastic after all). Was very easy to use. I was fertilizing my plants once a week and they did very well. I did not have an issue with the adjustment knob. I saw a couple of comments about not knowing exactly how much fertilizer solution (from tank) was mixed with irrigation water. Could that be done? Probably yes. Was I interested in knowing? Definitely no. If you think that one scoop of dry fertilizer in the gallon is not enough or too much, adjust next time. The mix I was using produces a pink color in solution. After I irrigate my plants once for 60 min, solution turn clear (so fertilizer was used). Happy with the purchase.1 year update:The tank started leaking bad this season. It seems like the leak is coming from the seam. The tank shell is made of two halves with a seam in between, and that's where the problem is. I am not sure how much of the fertilizer is making it to the plants. Very unhappy with the low quality. I took out 3 stars from my initial review. Tried to seal with 2 part epoxy and that didn't seem to help.Tried again to salvage the tank. The leak did not seem to be due to tank cracking, but the rubber seal not doing its job. I bought a few different sizes of rubber o-ring material, cut it to length and super glue it. That made a nice O-ring, but the unit still leaks. Frustrating to waste that much money for a unit that should contain water but does not because of poor workmanship. This product should be taken off market. Kept one star, yet wished I can give it -5. Garbage, will not trust that brand ever again.

Reviewer: AmazonAddict
Rating: 5.0 out of 5 stars
Title: Works fine!
Review: So this is my first review, I WILL UPDATE over time especially if this fails.I had to return the first one that was sent by Amazon because clearly it was used, had ptfe tape and stripped threads.So my water pressure is 100psi going into the irrigation. This is wayyyyyy too much for this device. Yes it will leak EVERYWHERE! I am currently running it at 77psi using a zurn pressure regulator seems ok but it's probably passing the limits of the device. I do need the pressure though because there are just too many sprinklers on the lines. I mainly wanted this for 2 of my 3 stations which the lower pressure will reach.I have a bypass valve on there with a check valve, when I want to use it I will simply turn the valve off and on them switch it back. I have a bhyve app to control my irrigation, so I'll run it manually. I have no way of checking to see how accurate this will do the mic, but I can tell you when running it and you turn the knob you will see an increase in flow in the small tubing.Few cautions with this....The threads are plastic. If you are going to be connecting this to an irrigation system make sure you know what you are doing. If you put the wrong threading on this you will mess up the threads. And you will get leaks everywhere.When screwing the cap back on don't just let it sit as you're screwing. Once you have the black part back on mostly lift it up and then screw with it in the up position so it can sit properly otherwise it will leak there..This is using standard garden hose thread (mht and fth). This will limit the water pressure if you need higher pressure. Lower pressure you should be fine. I am using a 3/4 pvc pipe from my mains, to a regulator into a pvc ftp to 3/4" hose barb to a mht then to the device using Teflon tape and a hose gasket.... I'm going out of the device I'm pretty much doing the same thing.I also feel like this will probably handle more pressure and last longer than a regular hose, because of the gaskets they use. On the other side of the wall which is not pictured I have a regular hose bib so I can connect and fill up my watering can. This is another thing you can do. I also installed another hose bib in the back where the main line connects for the same reason.if you plan on just connecting this to your house and using it I feel it would be too excessive but obviously everybody has their own reasons. I wouldn't connect it directly to a hose bib. I would use a hose and make sure that it is seated correctly without any pressure on the connections...The only flaw of this device is the device is pretty much plastic. And they don't make it so you can connect it to an irrigation system easy. This is easily connected to a hose bib which is probably the worst way to connect this. They should have made this device with MIP threading and I'm just included a FPT to hose bib connection piece for those who would like to use it on a hose bib.I hope this helps anybody that buys this for the same reason I did. fertilization is very important especially if you grow fruits and grow flowers. I did want to use this to also lower the pH of my soil. I can use some hydroponic stuff or I'm sure there's other methods of doing it. But that was the other reason behind this. But otherwise I could just do it manually for now.Update 9.15.2020The connection from the main line in started dripping because I barley hit it with a trash can. I couldn't get it to stop so I disconnected it. I placed a new gasket on it and used zip ties to really tighten it when as well as not letting the plastic slide off from it being tight. This seemed to resolve it.Also if using miracle grow, mix it. I filled the tank half way dumped the blue stuff in there and mixed it with a few oz. I also threw in some other stuff. To relieve issue when I'm done I purge the valve on the bottom for a quick second. Otherwise still good

Reviewer: Etienne
Rating: 1.0 out of 5 stars
Title: Leaks from multiple places. Do not buy.
Review: At first I was happy with the purchase. The product seems sturdy and well made. However, it leaked heavily. At first it seemed to leak from the seal of the lid. I installed and used properly, with just plain water and pressure reduced to 25psi. Customer service was excellent and send a "QC-checked" replacement. Same problem. Upon closer inspection I discovered the leak was actually from the seam of the two tank halves, near the top. The leak made water spray up again the bottom of the lid, and then flow down, making it appear like the lid seal itself was leaking. Not being able to waste more time with replacement, I repaired this leak by welding some PE in into the crack. This solved this leak. Only to move on to the next leak: the two halves of the tank are not properly aligned, causing two problems: 1. the thread for the lid is not continuous, making it impossible to screw the lid on flush and create a tight seal with the tank, and 2. the top of the tank that mates with the lid is not flush (the two halves are at an angle), also preventing a proper seal of the lid. I gave up and settled for manual fertilizing for now, I spent way too much time and agitation trying to fix these manufacturing defects.

Reviewer: RenegadeBurrito
Rating: 4.0 out of 5 stars
Title: Tank ruptured at seam
Review: Installed the product and it worked fine for about a month or so. Normal household PSI from garden hose.I turn the water to the tank off when not in use.After a month of daily use, the tank split at the seam where the 2 halves are joined together.However after contacting support they are replacing the unit.

Reviewer: Nicole Lin
Rating: 1.0 out of 5 stars
Title:
Review: Poor seals as this product start to leak at very first month, I was doing house renovation didn’t have time and forgot to start a return

Reviewer: Rog
Rating: 1.0 out of 5 stars
Title:
Review: Je ne vous recommande pas d acheter ce produit. Le reservoir d’eau a commencé à craquer après 4 semaines d utilisation.

Reviewer: Biju
Rating: 2.0 out of 5 stars
Title:
Review: This product is excellent & useful, but the tank will crack/rapture if you connect to the water line all the time, to prevent the tank from cracking add a water timer and let the water flow to the tank only when the sprinkler works. There are some severe manufacturing faults in this product. Also, it is highly priced, and not sure if it is worth the money.