Damien McKeever

first off, if i could get the squirrels drunk or install a flipper, i think the neighbors would call the po po

I was not sure how much heat would be transferred out of the water into the gravel before the water reaches the existing barrels if they were connected.

I thinking it will be best to have a valve to open or close the floor piping.

I was going to line the barrels up on the north side of the greenhouse, and connect them with a fill pipe that can push the water up from the bottom to the top of each barrel.  then have a gravity fed release from the bottom that can go back out to join up with the out from the floor and cycle back through the system.

I'm just not sure if the gravity flow will be enough to run without a pump.
Attached is a the complete as of now.

After three years of using a Flowerhouse pop up greenhouse to winter store our tropicals, we decided to keep it up this spring for veggies. This helps keep the squirrels out. This past winter I had 4 15 gallon water barrels stored in the greenhouse.

We plan to buy a Palram 6x8 greenhouse. I intend to add a solar powered solar water heating system to the green house. Dakota’s lithium has a simple diy kit.

The question is: do I pump the hot water during the day through the existing barrels of water or should I dig a pit and run the water though a gravel bed to warm the floor?

I have a plane for running it through the gravel, but I am not sure how to run one pump pull or push water through four barrels.