[J-Man]

FrightProps actually has a DIY write up on this.http://blog.frightprops.com/how-to-make-a-diy-water-mister/

 

[J-Man]

Yeah, that's not gonna work. Using a tee or "Y" just allows the air pressure to go in both directions. The mister setup works like the venturi in a carburator, the larger volume of the "air" tubing allows the passing air to pick up water from the small tubing that's inserted facing the outlet. The FrightProps set up you are referring to uses an actual pump for the water pressure.

 

[J-Man]

I've never done it but you may wanna try just a small universal windshield washer pump that runs on 12v. Do the same set up as the DIY version of the spitter but instead of relying on venturi action to pick up the water it will actually get injected into the air stream via the WW pump. Of course this set up would need a way to turn the pump on simultaneously with the air valve.

 

[J-Man]

I don't see the need to submerge the cylinder. All you would need is a pick up line in the water. I'm just speculating at this but if you use 2 check valves and a "Y", one line with check valve from the "Y" would go in the water, the other line and check valve would go to your spitter. When the cylinder gets moved in one direction it will draw water into the bore, when it gets moved in the opposite direction it will force the water out to the spitter. Again this is pure theory but on paper it works. Goes without saying you would need a 100% stainless cylinder.

 

[J-Man]

The water has to go in and out of the same cylinder port, it can't go in one end and out the other. That's why you would need a "Y" and 2 check valves, one flowing toward the cylinder and the other flowing away from it. The water cylinder only needs to be single acting not double.

 

[J-Man]

Just thinking, if it's a good spray you want without adding air to the stream, another option might be to use a garden sprayer. Install an air fitting to the upper portion of the sprayer bottle and use a solenoid made for liquid. Keep the sprayer pressurized at about 20 psi or so and then just activate the solenoid to spray.

 

[J-Man]

Well glad you got it working. I can't speak for everyone but I have to be honest, I think I'd be a little P.O'ed if I was looking at someone's display and got hit with that amount of water. A spitter is one thing but a heavy spray is a bit much!

 

[J-Man]

You could just install a stop on your cylinder set up so the 12 cylinder only gets drawn out a portion of the stroke. That way you can play around with the position of the stop until you get the amount of water you want.