Customer Reviews

Add-It fertilizer injector, pint capacity, 3/4" FHT x MHT inlet/outlet

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For years I've been looking for a small fertilzer injector that I can attach to my faucet and fertilze my small vegetable garden. I have a drip irrigation system and cannot use a dry fertilzer any more. This is exactly what I have been looking for. I can even use Miracle-Gro fertilzer in it! I'm now interested in installing a larger injector on the rest of my yard.

Had I known this I would not have needed a replacement.. Here is my feedback to customer service (very responsive and nice by the way):

Thank you for sending a replacement .. the replacement works great because I made some modifications to the in-line fertilizer. You can hopefully make these modifications to the in-line fertilizer; i think you will find these are safe changes to have in all cases.

There were two problems introduced by using products available at Home Depot with the in-line fertilizer:

The first is a short-hose from Home Depot. It is not only short in length but short in the female connector. At least one brand of short-hose at my Home Depot has a female connector that is approx 1/2 the width of most female host connectors. The mail end of the in-line fertilizer product has about 3mm of out-facing unthreaded plastic. Because the metal female hose connector was not as wide as most, only the first part of the in-line fertilizer threads were used in the connection before the in-line fertilizer's plastic started touching the gasket in the hose. Since there were not enough of the threading involved to hold the hose on, the plastic threads on your product stripped as the hose was tightened. The fix was to (after I got your replacement) hack-saw (about 3MM) off the dead plastic leaving the male connector of your product threaded all the way town to the end of the connector. The hack-sawing was very easy - just start slow then it cuts like butter. I did a bit of sanding to make sure it was flat as that needs to press against a rubber washer to seal. It seals great now.

The second problem is the same thing except on the female side. The problem is introduced with the Home Depot brass 2 way splitter. The splitter has a leaver that cuts off the water. The lever interferer with the female coupler on the in-line fertilizer. I removed about 3mm from the female side of the fertilizer; although I really only needed to remove 1mm. There are plenty of threads left to more than cover the brass threads. After the required hack-sawing that end fits perfectly too.

The device is well made but the opening for the solution is poorly engineered so that a funnel will not fit down into it. Spillage is therefore bad. Also the fertilizer must be in liquid form rather than granular. I am going to throw mine away