Need to create a hi pressure water geyser without using water truck or fire hydrant

[jakegreene]

I'm trying to create a geyser of water that will shoot out from a crater in the ground and into the air. I don't have the budget to rent a water truck, and only have access to a standard water spicket which has an output of 55-60 psi.

Someone suggested that I use a 'pressure pot', which is a tank you fill with water and then use a compresser to pressurize it. The result being that releasing the output valve causes the water to shoot out of the tank, but only for a few seconds...
I've never used a pressure pot and am not convinced that this is best solution to my problem.

If anyone has any bright ideas, (with or without the pressure pot), please let me know! It would hugely appreciated!

 

[Egg Born Son]

How big does it have to be and how long does it have to go for? If you are only able to capture a few seconds then slow-mo and use multiple angles. On a smaller scale a mentos/diet coke fountain shoots pretty high, maybe the chemical principle can be applied on a larger scale.

 

[clang]

Unfortunately, you'll probably have to do it full-scale or close to it - water is notoriously "unscalable", i.e. the human eye is experienced at judging water's real size, so a close-up of a small water geyser is probably not going to fool many people.

Would CGI be an option for the shot?? Plenty of particle simulation programs can generate water, to varying degrees of realism.