Making a high pressure misting system using a fire extinguisher - Dendroboard

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Old 05-08-2020, 08:04 AM
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Default Making a high pressure misting system using a fire extinguisher

There is a video online which shows how to make a high pressure misting system over 180 Psi using a fire extinguisher. Considering most misting systems struggle to provide 85 psi of working pressure - this is a pretty cost effective method it would seem - thoughts from dendroboard please
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Old 05-08-2020, 11:35 AM
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Default Re: Making a high pressure misting system using a fire extinguisher

I skimmed through the video. He is manually adding water and pressure to a fire extinguisher instead of using a pump. There is a lot of issues with this I think. For one thing if he doesn't clean it properly... you just squirted fire retardant chemical on your plants (frogs) etc. I don't know if that would instantly kill them but I can't imagine it would be good. Nor do I know how you could verify that you got all the chemical out of the system.. just because the water looks clear doesn't mean anything.

And then the whole thing is predicated on already having all of this stuff lying around because a quick search of amazon for a water pressure fire extinguisher did indeed turn up many options and all of them were over 100 dollars. At this point you might as well buy a mistking. And then if all this wasn't enough, when the pressure drops below a certain point your misting stops, and always always it is slowing down. So 5 seconds of misting on day 1 will put out different amount of water then 5 seconds on day 2.
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Old 05-08-2020, 12:30 PM
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Default Re: Making a high pressure misting system using a fire extinguisher

Also, I skimmed -- it is a nicely made video, and the guy seems really sincere and pleasant. That said, it is a Rube Goldberg contraption -- time consuming, complicated, and more expensive than buying something off the shelf that would work just as well, more reliably.

Also, PEX tubing has a maximum pressure of 160psi, the solenoid he linked is max 175psi. I absolutely would not trust a $10 solenoid to not drown my animals, even when working at its rated pressure.

Like so many things in the hobby, this is a solution in search of a problem. Like most herp care videos on YouTube, this one has a fair amount of entertainment value and very little animal care value.
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