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Cho Baka
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join:2000-11-23
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How to determine GPF of existing toilet?

I have a ~20 year old American Standard toilet that I suspect is not a thrifty unit.

Is it possible to identify the toilet and determine the number of GPF? I am assuming that my current throne is 3.5 GPF.






A quick back of the envelope calculation shows that it empties and refills the tank to the tune of approximately 3 gallons. This ignores any water that is discharged down the tube in the center of the tank.
--
The talented hawk speaks French.


ropeguru
Premium
join:2001-01-25
Mechanicsville, VA

Have you tried looking on the inside of the tank to see if it is stamped in?


Bob4
Account deleted

join:2012-07-22
New Jersey
reply to Cho Baka

Read your water meter, flush the toilet, read the meter again.
1 cubic foot = 7.48 gallons



Cho Baka
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join:2000-11-23
there
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reply to ropeguru

That is where I found what appears to be a date. (1992)
I found no other markings.

I considered using the water meter, but it reads in m3, and isn't really precise enough.
--
The talented hawk speaks French.



tschmidt
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join:2000-11-12
Milford, NH
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reply to Cho Baka

Good question, I think low usage toilets say how many gallons per flush. Ours is printed under the brand.

If your does not, and since you did a rough measurement I agree with your estimate it is probably 3.5 gallons. Time for an upgrade.

It looks like your tank is insulated. That is one of the things I wanted to do when I upgraded ours. Surprising how effective a little bit of foam insulation is in preventing condensation.

/tom



Cho Baka
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join:2000-11-23
there
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Yes, the existing one is insulated.
--
The talented hawk speaks French.



ropeguru
Premium
join:2001-01-25
Mechanicsville, VA

1 recommendation

reply to Cho Baka

Was just a thought..


Bob4
Account deleted

join:2012-07-22
New Jersey
Reviews:
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reply to tschmidt

said by tschmidt:

If your does not, and since you did a rough measurement I agree with your estimate it is probably 3.5 gallons. Time for an upgrade.

I have three toilets that are 28 years old, and there's no way I'm going to upgrade them.

Bob4
Account deleted

join:2012-07-22
New Jersey
reply to Cho Baka

You could flush multiple times until you get a decent meter reading, then divide by the number of times you flushed.
1 cu meter = 264 gallons



CylonRed
Premium,MVM
join:2000-07-06
Bloom County
reply to Bob4

WE just got a Cadet 3 - need to get a second one to replace out older toilet - they are fantastic (the Cadet 3s)...
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain



PoloDude
Premium,VIP
join:2006-03-29
Northport, NY
kudos:3

1 recommendation

reply to Cho Baka

Get a gallon container.turn off the water to the tank. Flush the toilet. Refill the tank using the gallon container. do the math.



Raphion

join:2000-10-14
Samsara
Reviews:
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said by PoloDude:

Get a gallon container.turn off the water to the tank. Flush the toilet. Refill the tank using the gallon container. do the math.

Woudn't take into account the water that goes down the refill tube into the bowl, which may or may not continue to run for a while after the bowl is actually full, wasting water down the drain.


shdesigns
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join:2000-12-01
Stone Mountain, GA
Reviews:
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reply to PoloDude

said by PoloDude:

Get a gallon container.turn off the water to the tank. Flush the toilet. Refill the tank using the gallon container. do the math.

Also capture the water from bowl fill tube to see how much water comes out there.


Cho Baka
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join:2000-11-23
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1 recommendation

reply to Cho Baka

I think I am satisfied with an estimation of 3.5 gpf being accurate enough. It matches up with the age of the toilet.
--
The talented hawk speaks French.


PrntRhd
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Fairfield, CA
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said by Cho Baka:

I think I am satisfied with an estimation of 3.5 gpf being accurate enough. It matches up with the age of the toilet.

Yes, the other benefit to a Cadet 3 besides 1.6 gpf is you can also get it in the height that works best, I prefer higher seating.

garys_2k
Premium
join:2004-05-07
Farmington, MI
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1 recommendation

said by PrntRhd:

said by Cho Baka:

I think I am satisfied with an estimation of 3.5 gpf being accurate enough. It matches up with the age of the toilet.

Yes, the other benefit to a Cadet 3 besides 1.6 gpf is you can also get it in the height that works best, I prefer higher seating.

Don't forget to plan for those occasions, too, where you have to kneel before the porcelain idol. You don't want to strain your neck!


sfogliatelle
We Is Whut We Am
Premium
join:2002-05-29
Baton Rouge, LA
reply to Cho Baka

The government made 1.6Gpf toilets mandatory a couple, three years after the manufactured date stamped on yours.



Cho Baka
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join:2000-11-23
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reply to Cho Baka

Pulled the trigger.

We went for a Drake II.
»www.totousa.com/ProductDetail.as···ctId=407


1.28Gpf/4.8Lpf

(stock photo)

I installed it today, and was surprised at how straightforward installation was. This was my first toilet.

I suppose part of the ease of installation comes down to the flange being in good condition. It pays to be lucky sometimes.

The next step is to install a plug behind the toilet for the washlet seat.
--
The talented hawk speaks French.


CylonRed
Premium,MVM
join:2000-07-06
Bloom County

Holy moley that is an expensive toilet...



John97
Over The Hills And Far Away
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join:2000-11-14
Spring Hill, FL
kudos:1
reply to Cho Baka

Nice. I am very partial to the Toto toilets.


Zach1
Premium
join:2006-11-26
NW Minnesota
reply to CylonRed

Toto toilets are high quality and pricy. With a 2-1/8" trapway, there should be plenty of "bandwidth" for even the largest "downloads".
--
Zach



CylonRed
Premium,MVM
join:2000-07-06
Bloom County

I did not notice it was a Toto.... Man - I just can't justify the cost. I have to replace one more toilet with a Cadet 3...
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain


lutful
... of ideas
Premium
join:2005-06-16
Ottawa, ON
kudos:1
reply to Cho Baka

said by Cho Baka:

I have a ~20 year old American Standard toilet that I suspect is not a thrifty unit.

In Canada, those were 13 Liter models - a standard value in those days. Converts to 13Lx.26G/L=3.38G


Cho Baka
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reply to CylonRed

I gave it much thought before pulling the trigger.
Main points were:
- the house only has one toilet
- my previous place had poorly performing water saver toilets and I didn't want to get stuck with a lemon
- a decent amount of 'noise' on the web about American Standard units that shouldn't have slipped through QA
- 75$ rebate
--
The talented hawk speaks French.


rfnut
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Fisher, IL
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reply to Cho Baka

said by Cho Baka:

Pulled the trigger.
....
I installed it today, and was surprised at how straightforward installation was. This was my first toilet.
....

Much nicer than an outhouse, aint it.

Bob4
Account deleted

join:2012-07-22
New Jersey
reply to Cho Baka

I had to use one of those higher toilets during a stay at a Ronald McDonald House. I don't like those toilets. I'd prefer one that was lower than normal.



CylonRed
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join:2000-07-06
Bloom County

1 recommendation

reply to Cho Baka

It is odd- the Cadet we have is a 1.28 gal/flush and it seems noisy but outside of the bathroom - no one can hear it. It sounds loud in the bathroom but it does not seem to transmit past the inside. Even with the toilet literally next to the door.
--
Brian

"It drops into your stomach like a Abrams's tank.... driven by Rosanne Barr..." A. Bourdain



dennismurphy
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join:2002-11-19
Parsippany, NJ
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Reviews:
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reply to CylonRed

said by CylonRed:

WE just got a Cadet 3 - need to get a second one to replace out older toilet - they are fantastic (the Cadet 3s)...

I prefer the Champion 4 for its extra flushing power (and height.) Having said that, the Cadet 3 is an excellent unit as well.


Cho Baka
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join:2000-11-23
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reply to Cho Baka

One thing I should mention is that the Drake 2 is what they call a "Universal Height" toilet.

Definitely higher than the old one.
--
The talented hawk speaks French.



battleop

join:2005-09-28
00000
reply to shdesigns

Divert the refill tube into another container and measure the amount of diverted water.