phxazcraig
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I'll ponder on that, but it's completely different from the current system (using halo drippers). Sounds basically like an in-ground irrigation system here.TLDR LOL
Just use a dry pump that can pull water from the tank and that will also pressurize it, if you want precision watering you want constant pressure, it's achievable using for example a 30psi pump for one "small" zone or a 60psi (better solution imo), on the main lines and 30psi pressures reducer per zone/tent/irrigation loop.
Than you control water flow by using different rates pressure compensated button drippers before your actual plant dripper. you can use the rated drippers to achieve your desired flow of water per time. there's 1-2-4-8L and 16L per hour button drippers afaik, after that it's only some simple math to achieve what you want.
Thanks, but I'm going to try a bit more on my design as it is very close to working (and I have seedlings in red solo cups now so need to finish this).
My latest alteration is simply to buy a much smaller pump (95gph) instead of the 800gph unit I was using to fill the upper bucket. With this new system I will fill the upper bucket with 1/8" ID aquarium tubing, so it won't overflow the bucket. Everything else works fine. And it's both easy and cheap, ultimately.
Here's the TLDR description:
... 30-gallon reservoir holds nutrients and is refilled by hand 2x weekly. Small pump in reservoir continuously pumps nutrient solution into a 5-gallon bucket perched above the reservoir. Bucket has two holes drilled near top with spigots installed to allow continuous drain back into the reservoir. Second pump in 5-gallon bucket hooked up to timer and set to feed Drain-To-Waste system as often as every 2 hours. Pump in bucket always seems the same head pressure so gives (MUCH) more consistent flow than feeding directly from the bottom of the reservoir.