07-07-2021, 11:59 PM
I'm curious, what does your concrete tank look like? Is it open at the top? I'm wondering if it's possible to put a liner in like with a metal tank. My friend's tank in Alaska under his house had a concrete top and only a small service hatch. I've only seen one concrete catchment tank in Hawaii and it was being used as a swimming pool. I think the "catchment tank" moniker was for permitting or insurance reasons, because the house water came from a separate metal tank.