This is amazing! From where did you get these things? What exactly does the water booster do? I'm also not sure what issue the bladder tank is meant to solve. I'd love to see pics of your greenhouse and entire set up. Very inspirational thus far!

If I may make one suggestion about your pump set-up it would be to include a "Cycle Stop Valve" with your bladder tank. This valve is adjusted to prevent that on off cycling that you experience. It is that cycling that wears out a pump. With the valve adjusted to the desired flow it keeps back pressure on the pump preventing it from reaching the shut off pressure. Once the flow of water to your greenhouse stops then the bladder tank would finish filling and when your shut off pressure is reached your pump would turn off. When flow is resumed the bladder tank would feed that demand until such time as your cut in pressure is reached. I use one called a model CSV1A. My well guy put me onto this due to our water requirements for the hundreds of roses we grow.

I like your tank setup, very professional and well thought out.

I hope that stacked construction is extremely well-balanced; having that much water suspended could be a hazard.

Thanks, Roseguy. I’ll look into that. Sounds like it may help. The tank I have now is small and just runs continuously try8ng to fill the tank while I am watering.

I'm still lost as to what this all does for your GH? Is this how you water everything?

Yes, i use the rain barrels to water the plants in my GH and my garden. I am installing a larger tank this week - maybe it will be big enough for lawn sprinklers. We’ll see.

Nice job, only anyone trying this needs to check their local codes as some jurisdictions restrict how many gallons you can collect and store.