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fire extinguisher oil injector. 

This turns a old junk fire extinguisher (Kidde brand) into a oil injector tool, I plan to use this is to fill small tanks like a hydraulic tank that fills to slow with a oil funnel (like a pallet jack)

You use a 1/4 (or other size hose) from the fire extinguisher fitting into a tank you need to fill and add (regulated to a low psi) air to the other port of the fire extinguisher(the side with no fitting) and it will push the oil from the tank threw the hose to where you need it.

The bottom side has a port and a 1/8 thread to add a 1/8 to barbed fitting, You need to add a hose that goes to the bottom of the tank to the barbed fitting.

You will need a o-ring to seal the tool to the tank.

V3 is if you want to use other size fittings (you will need three)

v4 needs one 1/8 NPT to 1/4 barbed fitting 

Might want to look at using