Step 1: The Idea
Along with the water pump, my system uses gravity to assist the flow of water. Each end of the PVC is one inch higher than the end that comes next in the circle. The end of the tube that water enters from is the highest, and the end that it leaves from is the lowest. To achieve this, I built supports out of lumber for the pipes. The supports also keep them high enough to be above the reservoir, so that gravity will return the water to it.
Step 2: Materials
- 66" of 4" PVC Pipe - If I didn't already have PVC, I would have probably bought plastic gutters.
- Assorted lumber - Go to the cull wood section of your hardware store. This is the wood they cut for other people who didn't want the scraps. I got four 43" 2x4"s, one 1.5x7.5x58" piece, and a scrap of plywood for $3.
- Screws and such
- 4 rubber adjustable end caps with hose clamps - about $3 each
- Submersible pump - I'm using this
- Teflon tape
- 16 oz Plastic cups
- Irrigation tubing
- Opaque Bucket
- Plumbing cement
- Growing medium - I used expanded clay ball
- Hydroponics Nutrient