On Sep 15, 12:07*pm, DerbyDad03 wrote:
I just replaced a 1.6 GPF toilet with a American Standard 1.28 GPF
toilet. It received a 5 Star (best) flush rating by using a 2-1/8”
trapway and a 3” flush valve.

The first thing I noticed is that in order to get the full flush you
have to hold the handle down for a second, otherwise the flapper
closes too soon. I haven't had any problems, in fact the short flush
seems to work for liquids just fine, but it's a tad inconvenient. My
other toilet (1.6) needs just the tiniest push on the handle to start
a complete flush.

I called American Standard and they said that that's how they work.
Yes, you have to hold the handle down to get the full flush.

Anyway, I was just curious about other 1.28 GPF toilets. Same issue?

The other thing that I was wondering about was whether the small
amount of water being used is enough to move things along once they
enter the pipe. *Doesn't a 20% decrease in water mean a 20% decrease
in "flow force"?

Sure, the toilet flushes fine due to the large trapway and valve, but
what happens after the stuff leaves the fixture? Is 1.28 gallons
enough to keep things moving through the pipe?

FWIW, I installed 2 Toto's last year after cussing the 1.6's. Toto
had the patent on the flush design and was one of the very few
manufacturers who had a low flush toilet that actually worked. When
their patent ran out about 2 years ago, many manufacturers, including
AS, copied the design. Your toilet operates the exact way my Toto's
work. Press the handle for 1 sec for liquids and 2-3 sec. for
solids. Takes a bit of getting used to from the old ones, but not
long. The kicker though is visitors who don't know the secret.
You'll hear several flushes and mumbling coming from the bathroom when
they use it.

And I've never had a single problem with this design not moving solids
down the line. In fact just the opposite from the previous lf units
that gave me a lot of problems with that issue.

Red