Toto Ultramax, sound

Hi Everyone and thanks Terry for he review on the Ultramax, as a result I replaced five toilets in my house with the ultramax.

My question is it normal for the ultramax to make a suction sound then water sound? It is definitely not as loud as my previous toilet, but still wakes me up in the middle of the night when wife uses the toilet. I'm a very light sleeper anyway, but I just want to make sure I installed it correctly.

Thanks!

Does it sound like this, then yes it's corect.

http://www.youtube.com/watch?v=5faDbidCBnI&feature=related

Thanks!

These toilets are awesome, never thought I would be in love with a toilet.

We got tired of using the plunger in our old toilets 4-5 times a week. Haven't needed a plunger yet with the Toto.