My leak in my gray tank was where the outlet goes into the tank. I guess it is just a weak connection process. But some folks have had leaks at the top where the vent pipe connects to the tank. Others have had an actual split tank on the bottom. One fellow recently fixed his bottom leak using a plastic "welding" process.
It can be a tough job finding exactly where the leak is located.
Good luck and let us know what you end up doing.
Thanks,
HamRad
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