Not much, generally! They would be sealed with cement, and the water itself would cause calcium buildup along the inside, which insulated it further (and required the waterway to be disassembled and cleaned every once in a while). If there was a leak, generally that meant something was wrong and it would need to be inspected.
How badly did that thing leak?
Not much, generally! They would be sealed with cement, and the water itself would cause calcium buildup along the inside, which insulated it further (and required the waterway to be disassembled and cleaned every once in a while). If there was a leak, generally that meant something was wrong and it would need to be inspected.