I have 2 separate 1200 gal poly round cistern tanks that I would like to connect together with a 3 or 4 inch pvc pipe.
There are bulkhead fittings at the bottom of the tanks that water goes out of, and there is a manway at the top of each tank that water goes into, but they fill at different rates and I would like to equate the levels with the aforementioned 3 or 4 inch pipe say 3/4 of the way up each tank tying the 2 tanks together.
Since the tanks are round I don't think a bulkhead fitting would be good to use. I searched and heard pretty good things about "Uniseal's" that are supposed to work well on curved surfaces.
Has anyone ever used a Uniseal type fitting and did you like it?
In addition to tying the 2 tanks together I would possibly like to install a riser in the same pipe and make an overflow prevention pipe that goes up and then turns 90 degrees and goes outside.
These cisterns are for drinking water and are located in a room slightly below grade.
Any help or advice is appreciated!