Water Tanks, page-66

yep, me looked into that issue (leaching) last century and was not able to find any product worthy of my hourly work hours (cost)

So me just have a dry system using PVC

Major supplies well the new are plastic (well type of), some older ones have a product that needs a tool box meeting, even to think about touching

Some large metals ones used to use lead as the caulking.

glad me rarely drinks city water the pool smell is bad enough