Toto Aquia I CT414M tank to bowl leak / replace TS810DV2 rubber washer ?

[PierreYC]

Hello

I’m currently trying to reinstall a Toto CT414 / Aquia I toilet, but can’t figure out how to fix the leak coming from the tank to bowl nuts connection.

I have already checked the supply valve and flush 3" : they don’t leak.

After two unsuccessful installations, I placed the toilet over my basement sink to inspect carefully where the leak comes from : it is definitely from the bolts, even when tightening with more force than my hands have (not in the first time, but I retightened them after seeing the leak)

I suspected the old washer to be the culprits as you can see below

In addition to being heavily marked, they seem to have been installed off Center.

Before ordering the C$45 bolt replacement set, I tried, unsuccessfully again with regular tank to bowl set. The much smaller washer don’t seem to be enough. Again, I tightened them strongly without success.

Is there anything I’m not doing right ?

Is there a way I can find only the rubber washer to replace ? My local stores don’t seem to have such large washers. Do you know the exact dimensions ? I measured ID 7/16 OD 1"3/8.

Thanks a lot.

Pierre.

Additional image of the inside of the bowl

 

[PierreYC]

Problem solved :

I tried another time with regular bolts and washers, and it worked without leaking. Of course, it much harder to install near a wall so I mounted the tank on the bowl before putting the whole thing into place.

Not ideal, but it worked.

 

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[Terry]

Sorry I missed this one. The last time I had an extra tank I was able to rob. I was hoping you would have found rubber washers at a hardware store. Nobody had that size? Yikes!