There is water dripping out of the part of the t-valve adapter connected to the toilet tank. The angle required to tighten the bolt with a tool makes it (seemingly) impossible.
Wrench? Not enough space to turn it. Pliers? Too big to reach it. It’s been tightened by hand as much as possible, but still leaks.
Even when I remove the other connections, the problem is still the lack of space to work with.
Any ideas for a solution? Thanks, kind folks.