Fertilzer injection into drip lines

Maidstone, United Kingdom

Last year I used drip lines for the first time, and what a godsend they are. This year I expanded that and want to introduce fertilizer injection with a venturi, but. I cannot get either of the two I bought to function when injecting into 4mm line although I do have about 150L/Hr into the line and less than 20psi from the tap.

They just don't inject although plenty of websites say that this is just the kind of thing they are for, some explicitly say they are for fertilizer injecting.

I use the injector in parallel with a control valve just as in the image

Any idea's ?

This message was edited Jun 28, 2019 4:30 AM

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