YOU SAID:

Toilets are supposed to go BowWHOOOOOSH!

INTO JAPANESE

トイレは「ボウシューッ！」ってなるはず！

BACK INTO ENGLISH

The toilet should make a "boosh!" sound!

INTO JAPANESE

トイレは「ブーッ！」という音を発するはずです。

BACK INTO ENGLISH

The toilet should make a "beep!" noise.

INTO JAPANESE

トイレは「ピーッ！」という音を発するはずです。

BACK INTO ENGLISH

The toilet should make a "beep!" noise.