Joshua States wrote:A photo or two would help me understand the situation better and come up with a suggestion.
Most of our PVC piping in the States is a standard thread commonly called "iron pipe" (MIP, FIP). If the thread on the tank doesn't match, it's probably a metric size/gauge and good luck finding a matching adaptor. You could try removing the threads from either the tank outlet or the inside of the ABS adaptor and creating a slip fitting. Then, just use a PVC or ABS glue to connect them. Glued connections in PVC/ABS are quite common and watertight, even under pressure.
Christopher Weeks wrote:What's happened with these trees since this was current?