DIY Misting Pump Ideas?

Well, there's your answer.

I'd say you need a minimum of 20 PSI. Double it for better/finer spray, which will also result in a somewhat increased flow rate.

 

If it is called a spray nozzle instead of a misting nozzle, you may be getting more of a sprinkler instead of a fine mist. That may be what you want, just be aware.

 

Whoa! That's over an ounce per second. Those are not "misting" nozzles; more like deluge.

 

Mistking.com

 

Jai, Mist King is the king. They are great nozzles.

These aren't as good, but you can find them cheap (and take up less space depending on what you want to do). I make little adjustable heads like the mist kings by adding little pieces of tubing and elbows. You can then turn them in any direction to focus the spray.
http://www.mrdrip.com/680--34-GPH-Barbed-Mist-Nozzle-Bag-of-5_p_332.html

 

Yes I did, if you want to learn more about it, you can look at this thread....
https://www.orchidsforum.com/threads/my-office-orchids.17443/

Let me know if you have any questions.

 

I use a diaphragm pump. It is 60psi and 110volt. You can find 12volt ones a lot cheaper (Like the one I posted above), but then you need a power supply. The nice thing about the 110 volt is you can just plug it into your timer and you are done. I have 1/2" tubing pulling from about a 2 gallon reservoir. It lifts the water about 3 feet. The output goes through a 1/2" hose to a reducer into the 1/4" black tubing. those go up to the mist heads in the picture.

I run it 2 times a day 30 seconds each time.

 

The tank is only 14 inches Tall and wide and 10 inches deep.