Today I will be experimenting with different types of watering systems.
In the past we have used a gravity feed system that has worked in varying degrees. The first year we took 5 gallon buckets and punched holes in their bottoms, added some PVC pipe and a soaker hose. We set the buckets on a stand that was about 18 inches high and just poured water into the buckets. I worked well enough. The buckets drained in a few hours and the soaker hoses concentrated the water right along the base of the plants. All in all, it was a success. But because it was cobbled together and not properly designed it was a bit clunky and had some maintenance issues.
Last year I built much better support stands for the buckets that could be moved around as needed, and I used better connecting hardware for the soaker hoses and PVC, but the system didn't work at all. I believe the stands were too short as I really can not think of any other reason for the failure.
Water has a base pressure of 0.433psi per column foot. What that means is if you have a bucket with one foot of water in it, the pressure at the bottom of the bucket is 0.433psi (pound per square inch). If you raise that bucket off the ground one more foot and add a pipe to the bottom (1 foot long) the pressure at the bottom of the pipe will be 0.866psi. This is how hydraulic pressure works. It does not matter how manny gallons of water you have, just how tall it is.
For example, if you have a swimming pool that is 10 feet deep and dive to the bottom you will experience a pressure of about 43psi whether the pool holds 1000 gallons or 50,000 gallons. It doesn't matter as long as you are only covered with 10 feet of water.
All that being said. What I need to do is figure out how much pressure it takes for the soaker hoses to release water, and make sure the buckets are high enough to supply that much pressure. I'm guessing that it's going to be about 0.6psi based on the success of two years ago with the buckets at 18 inches. The question is what is absolute minimum. If I put the buckets too low they won't work. If they are too high I won't be able to fill them without lifting water above my head. So I'm looking for a happy medium.
That is todays project. Wish me luck.