I try this 1/4" version to nject fertiliser into line to feed & water pots.Output into drip line is 50l/h but there is no fertliser uptake.Help please

For venturi injectors to work, they need the right pressure and water flow. I suspect that this is not going to work for you. I am running into a similar problem with this type of injectors (not this one in particular). The 4th photo of this item shows the performance of this injector (1/4 inch A12057). Indicated water flow is between 50L (0.05m3) and 200L (0.2m3). The flow you are using is at the borderline of this injector not working (assuming that the flow to the garden is exactly 50L and not slightly below). Also check the pressure. Again, as indicated for this injector in the photo description, it requires between 28 and 43 psi for input and a maximum of 14 psi at the outlet (drip line). If you have higher than 14 psi at the drip line the injector will not work either, because venturi injectors require a certain pressure drop between inlet and outlet for them to perform. If there is anyway you could add some drippers to increase flow this might work. That's the curse of the small garden, videos you see online do not mention all these details. As I said before, I do not have experience with this injector in particular, but I will go ahead and buy it because based on my calculations I have a flow of about 50 gallons/h (~200 L/h), so this should work. Good luck!

What thread size and type is this?

3/8" I'm using Stenner feeder tube nuts with ferrules to hold 1/4" hard tubing.

I'm new to this.. (1) what is the "check valve" for, and (2) what is it about "priming" ?... thanks in advance afr

Check valve is a kind of valve whose opening and closing parts are circular discs and act on their own weight and medium pressure to block medium backflow

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⚡ Elevate your ozone game with precision mixing power!

COMPACT LIGHTWEIGHT - Ultra-slim profile (5 x 3.5 x 0.03 inches) and featherlight (0.3 oz) for easy handling and minimal footprint.
INTEGRATED CHECK VALVE - Prevents backflow, safeguarding your system and enhancing reliability.
PRECISION 1 4 INCH FIT - Seamlessly integrates with standard ozone generators for hassle-free installation.
DURABLE PVDF CONSTRUCTION - Engineered from high-grade plastic ensuring chemical resistance and long-lasting performance.
ADVANCED GAS LIQUID MIXING - Optimizes ozone infusion with superior venturi design for maximum efficiency.

The TRKIMAL PVDF Venturi Injector is a compact, 1/4 inch gas-liquid mixing device designed for ozone generators. Featuring a durable plastic build and an integrated check valve, it ensures efficient ozone infusion and system protection. Lightweight and easy to install, it’s the perfect upgrade for professionals seeking reliable, high-performance venturi injection.

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Material	Plastic
Brand	TRKIMAL
Exterior Finish	Plastic
Inlet Connection Type	Solvent
Outlet Connection Type	1/4 inch NPT female
Number of Ports	2
Specification Met	energy
Manufacturer	Kymlaa
UPC	743829247507
Part Number	TRKIMAL0050
Item Weight	0.3 ounces
Package Dimensions	5 x 3.5 x 0.03 inches
Item model number	TRKIMAL0050
Included Components	NO
Batteries Included?	No
Batteries Required?	No

Pvdf Venturi Injector 1/4' Inch Gas-Liquid Mixing Venturi Injection for Ozone Generator with Check Valve

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