HagenKB

Stopping Power Head Venturi

I use a Power Head to move water only, I don't want air bubbles. How can I make a water move without these very small water bubbles?

I use a Power Head to move water only, I don't want air bubbles. How can I make a water move without these very small water bubbles?
You must ensure the Power Head cannot get air in to the Venturi and that the impeller is never above the water line.

1) Place the unit fully under the water so no air contacts the unit.

2) Take the air line that came with it, tie it in a knot to close it completely. Then isert the closed tube into the Power Head's Venturi hole. There is an additional hole as well, so the warning to keep the unit fully submersed is very important to eliminate air insertion.

Alternately take a small piece of the airline and squirt a bit of silicon to block it, but leave about a 1/4" of the end without any filling to make it easier to place the airline into the Venturi. If it is completely plugged, the line may not compress enough to allow easy entry into the Venturi hole.

Finally, you might find that submersing it entirely will eliminate all air bubbles anyway, without knots or plugs, the really important point is that the output must be below the surface enough that it cannot draw air into the system to blow it out. Simple submersion often cures this.

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