Water Gardening: 120' creek bed / pvc vs. black flex pipe, 0 by mdvaden

mdvaden wrote:
Okay, this may look funky, but it works for irregular lined cavities - retains the hollow space for water. I use 4 pieces of rigid thick pipe on the lowest valve box edge to prevent depression. And a couple of layers up, I lay two more pieces of the heavy thick pipe the other way. But most is the light weight ADS.

I'm going to have to add a shut-off device in this cistern in case anybody shuts off the hose faucet knob accidentally (it will feed water to the auto-fill valve). Doing a test-run on just the black liner, the 200 gallon reservoir level drops at least 8" to a foot in a day, since it's only about 3 1/2 feet wide half way down. The black liner (alone) really heated the water a lot on the 80 degree day, but it may be comparable for what to expect in the rock filled channel on a 100 degree day.

There's no room for error. I was almost considering 2 auto-fill valves side by side, but one should suffice if I install the diaphram Little Giant shut-off switch (about $50).