Garden Sprayer Conversion: Installing a Vinturi Tube for Oil Draining - Step by Step Guide

Hello )

I have a typical garden sprayer. I saw on the Internet in the offer of sellers that the same sprayer can act as a sucker for various types of liquids. I know that you need to apply the so-called Vinturi tube, but I don't know where to install it and what it looks like. Could you please help me?
Thank you in advance and best regards

You would have to install the Venturi tube as shown in the picture

1-wire from the side of the sprayer.
2-tube immersed in the suction liquid.
3-tank where the sucked liquid is transferred.
But for this to happen, you would have to use a compressor. Suction nozzles offered in stores operate on the same principle as sprayers, only the one-way valve is set there in the opposite direction, which creates a vacuum instead of an overpressure in the tank.

Thank you for the tip and interest in the topic ) I have already ordered the valve When it arrives, I will let you know if it works
greetings

Forgive me for asking. You didn't rush too much? What valve did you buy if you can ask?

I ordered non-return valves https://www.aliexpress.com/item/4Pcs-Lot-Plas...iesel-Gas-Liquid-Water-4-6-8/32728864505.html ? spm = 2114.13010708.0.0.vfagED

and

such a valve https://www.aliexpress.com/item/High-Quality-...-Way-Electrical-Valve-VE496/32621531462.html? spm = 2114.13010608.0.0.UmCPip

Today I got them, however, it was impossible to get a vacuum (((

You bought these valves a bit too hastily, read my first post. Speaking of one-way valves, my point is that the sprayer is built on the principle of a pump, it has 2 non-return valves, by lifting the sprayer piston we suck air from the outside into its cylinder, lowering the piston we push air from the cylinder into the tank. The non-return valves installed at the factory in the sprayer direct the air to us in this way, when lifting the piston, they do not allow us to draw air from the tank, and when lowering, they do not allow the air to exit the cylinder outside. We want to extract the air from the tank, so the valves should be reversed, unfortunately I do not know how the valves in your copy are solved and whether it is possible to modify it physically.
https://www.youtube.com/watch?v=0pfPOuzLPuw
On the example of this video, you will understand what an example valve reversal looks like.