This is interesting from a humanitarian standpoint since it could be used to provide cheap drinking water to impoverished areas of the word that lack steady sources of clean water.
But I wonder if it has any application to, let's say, someone who wants to live off the grid or as a nomad roaming the land.
I'm sure that a source of pressure could be found that would allow this to be viable for someone living a more sedentary lifestyle. Perhaps the tube could be connected to a large tank, allowing the mass of the water to apply the pressure needed to push water through the wood.
If 5psi is needed, you would just need a column of water with a base 1 square inch and that is tall enough to contain 5lbs of water. 5lbs of water is about 2.3L. Since 1cm^3 is equal to 1ml, we can take 2300mL and divide it by 3.14cm^2 to get the height of the necessary column for a 1in^2 tube, which is about 7.3m (~24ft). But since a tube of 1cm diameter tube is only .5in^2, we can cut the height by halve.
12 ft tall would make for a large tank, but it's doable if you have a permanent place of residence.
Please correct my math if it's wrong.
Maay-yo-naze!