Toto Drake w/ Transitional Tank

[fxsts]

This is my very first post.

I got a Toto Drake w/ Transitional Tank yesterday. When I took the tank out of the box, I noticed a large half-moon shaped chip (see pictures). I thought that it was defective and was ready to take it back. Then, I decided to call Toto before heading over to Home Depot. To my surprise, Toto tech support told me that it's normal to have it, which he called a "casting mark".

Is this indeed normal? I have dealt with a fair number of toilet tanks during 50+ years of my life, but I do not recall seeing anything like it before.

Thank you in advance for your expert opinion.

 

[Reach4]

Normal.

https://terrylove.com/forums/index.php?threads/cracked-toto-promenade-tank.52579/#post-383953 says

The semicircle is for the wires to install the auto-flush mechanism on a newer Toto washlet. All the newer Toto tanks have it.​

 

[Sponsor]

 

[fxsts]

Normal.

https://terrylove.com/forums/index.php?threads/cracked-toto-promenade-tank.52579/#post-383953 says

The semicircle is for the wires to install the auto-flush mechanism on a newer Toto washlet. All the newer Toto tanks have it.​

Thank you very much for your prompt response.

 

[Terry]

Here is a standard tank. Sometimes you get the half circle and sometimes you don't.

 

[WJcandee]

Yep. What Reach4 said. It's for the wires on a Washlet autoflush.