Yardwe 3/4 Inch Fertilizer Injector for Drip Irrigation Venturi Fertilizer Mixer Injectors Device Tube Filter

I almost gave up on this… I researched and researched and finally found a video on youtube about Mazzei Venturi Fertilizer Injector. I bought the parts at Lowes last night (2 trips)… and put it together in the garage. Tested it today… AND IT WORKS!!!!Now the issue is when I attach something to the end of the hose. The pressure increases and the suction stops… but if i simply use my finger at the end of the hose… the suction continues.Now I need to research what attachments i can place on the end to make fertilizing easier. I want to be able to enter this into my sprinkler system eventually.

This is a piece of a larger system. If you are trying to use this in the water hose alone, it is not meant for that and therefore will not work. The ends are not the correct threads for a garden hose, which should be the first clue. For about $15 in parts from your local plumbing or hardware store, and tutorials found online, you can build an excellent injector system that is sold through some of the other irrigation companies for $160+. I did it with zero plumbing experience and now I can sit on my porch and watch it work instead of mixing and spraying by hand. The only thing I would do differently next time is police unions on either side of the Venturi so that I can remove it easily to queen, and I would also put a shut off valve on the right side so that water does not backflow through the system when I want to just run water with no fertilizer.Since it is a suction system, it is reliant on a lot of variables including your water pressure and the output.I found that it would not run with one sprinkler because there was too much pressure on the lines and not enough flow over the Venturi piece, so I solved this by connecting two sprinklers to one another and this increased the output enough to gather suction.Eventually I would like to try to connect it to an actual drip system, but I’m not sure how to get past the problem of the pressure buildup in the lines causing a loss of suction. Otherwise, this is a cheap and very easy to operate unit, once you figure it out.

A little bit of a complicated review. I purchased this for use with a drip irrigation system. Every video I watched referenced how to use it for a sprinkler system and my brain did not put 2 and 2 together.First of all- notice that it has 2 male hose ends. Save yourself a run to the hardware store and get that worked out ahead of time. The product's threads are not NPT.Second- a sprinkler system does not build pressure and cause back flow the way a drip irrigation system does. This will cause your water to fill up your jug of pesticide or fertilizer or whatever. In my case, it was organic insecticidal soap.We initially set everything up with plain water and blue dye to make sure that the treated water came out of the furthest mister. Nothing. Nada. My jug filled up with water.I realized that there was no pressure forcing the treated water into the injector to allow the water pressure to siphon the rest as its supposed to. My husband and I removed the end screen piece and attached the hose to the nozzle of a pump sprayer. Turned the hose on; it filled the jug again. Turned it off then primed (pumped the sprayer full pressure) then turned the hose on, THEN released the nozzle on the pump sprayer. No go.Finally, I pumped for the life of me while he turned the hose on and KEPT PUMPING- sweet, sweet insecticidal soap misted my plants. The water in the siphon line still diluted my treatment some (insecticidal soap makes water a foggy yellow.) Thankfully, the siphon line is clear so we could see the difference.Eventually, we turned the hose to very low water and pumped like a mother until the insecticidal soap was pretty much the only thing coming out of the misters and called it a day..It DOES work for misters, you just have to get creative. Not wanting to kill my back spraying every plant just for the aphids to move over a row is a powerful motivator.Also, in a pressurized system like a drip irrigation system, it will blow the lines off of their attachments, so you pretty much have to leave it at 4 (which is wide open) and still zip tie the hoses to the flow adjuster.

Like the many people who have commented this is not as straightforward as let on by the reseller. As others have concocted solution I to did the same thing. He is my solution. What I have is a ¾” pvc pipe line irrigation that runs into a 14 valve manifold with around 100 psi of pressure. I cannot afford the lost in pressure a straight inline install would allow. The way around this to build the by pass system that others have shown with a small tweak, on the downstream side increase the pipe diameter to 2” or larger pipe for about 10 ft. then back to the 3/4". The theory is to reduce the pressure and not the amount of flow. In Fluid dynamics a larger pipe will reduce pressure not the volume of flow. I also highly recommend using turn valve along the main line and ball valves on the by-pass manifold. The reason being the need to dial the flow down to create the desired pressure offset for the suction.I now enjoy have my garden and flowers fertilized while being watered with no hassle to me. I just add a tablespoon of miracle grow to a 5 gal water jug once a week. The results have been fantastic. Only wish I had done this 2 months ago.

This is an update to my previous review. After receiving the adapter and setting this system up I couldn’t help but notice two things, one the water is spewing from the fixture itself and most importantly it’s pushing water through the feed tube into my fertilizer container causing it to overflow. Why do companies sell cheaply made products like this?This Venturi doesn’t fit right into your faucet and hose without an adapter. You’ll need to make or purchase a male to male/double female adapter to make it work. This information should be included with the information about the Venturi.