Hello, I recently purchased a 1982 Toyota Dolphin and have been using the toilet the past couple of weeks and took it down to empty the black water tank.
When I got there I was not able to find the dump valves, just the hole where it drains and what looks like a rubber block or something that keeps the tank sealed.
Below is a photo the the area I am referring to. Hope someone out there is able to help me figure this out before I have to take it into an RV mechanic and drain it there and install some different hardware.
https://photos.app.goo.gl/AjaJWE4fB3J5zCak9
Thanks in advance!