Best American Standard Toilets

Best American Standard Toilet: What Is It?

The Best American Standard Toilets (BAS) are the most popular type of toilet in America. They have been around since the early 1900’s and were originally designed by John Pemberton. The BAS was first introduced in 1901 and remained relatively unchanged until its discontinuation in 2005.

There are several different types of BAS, but they all share similar features such as the following:

One piece construction with a single seat cover. There is no separate bowl or lid. The seat covers are made from plastic and rubber. They do not rust or corrode like metal seats would.

No water spout. A drain hole at the bottom of the seat cover allows waste to run out into a container when it rains (or if there isn’t any rain).

A “flush” button located near the top of the seat cover. Pressing this button will cause water to shoot up through a tube connected to the flush valve and then down into a receptacle at the base of the seat cover.

Two handles on either side of the seat cover that allow access to both sides of the toilet. These handles are usually painted red or blue, depending on which type is being discussed here.

A plastic trapway located a few inches below the seat cover. It is where waste enters and flows into the tank.

Best American Toilets are usually installed with a water tank outside of the bathroom. The tank is connected to the toilet with copper or PEX tubing.

How To Use An American Standard Toilet

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Waste enters the trapway at the bottom of the toilet bowl and flows into the tank. As more waste enters the tank, the water level rises and eventually hits a float. The float is connected to a lever that is attached to a gear mechanism inside the tank. When the float hits the lever, it rotates the gear which causes another gear with sharp points to grind against a small sand timer.

When the timer reaches zero, it stops the first gear and causes a flapper to drop down from the tank to the drain pipe. This stops waste from entering the tank and the toilet is said to be “flushed”.

Waste in the bowl flows down through the drain pipe and enters the sewer. After a period of time, the flapper automatically raises back up to allow water to fill up the tank again. When the tank is full, the float rises up and hits the lever again, restarting the entire process. This entire process repeats until you decide to get off of the toilet.

Best American Standard Toilets are considered to be very sanitary. The lack of a separate tank and lid allows for easy cleaning and a good, tight seal that prevent leaks. The seats and lids are also much easier to remove and replace than standard two-piece toilets. The fill valve, float, and flapper are usually the only things in need of replacement every few years.

BAS are prone to more odors and stains than other types of toilets, but the plastic seat covers help to minimize this problem.

Tips For Using Best American Standard Toilets

Try to avoid using too much toilet paper. Soft, unscented large rolls work best.

It is always a good idea to sit towards the front of the toilet, over the trapway. This will prevent an accidental clog from occurring.

Do not throw cotton swabs, sanitary pads, or other soft materials down the toilet.

Do not flush large amounts of toilet paper down the toilet at once. This can clog the toilet and prevent waste from flowing into the tank. If you have too much toilet paper, hold some of it in your hand and throw that, then continue doing this until all the paper is gone.

Best American Standard Toilets - from our website

Try to avoid flushing bodily fluids down the toilet.

Sources & references used in this article:

Session track at TREC 2010 by E Kanoulas, P Clough, B Carterette… – Simulation of …, 2010 –

Evaluation of potential best management practices by J Koeller, Y Linda – 2005 –

Economic and environmental analysis of standard, high efficiency, rainwater flushed, and composting toilets by C Anand, DS Apul – Journal of Environmental Management, 2011 – Elsevier

Dual flushing system for toilets by DJ White – US Patent 2,532,977, 1950 – Google Patents

Flush toilet accessory by CF Phripp, NR Preston – US Patent 4,134,165, 1979 – Google Patents

Lateral extension bowl attachment device for adapting standard relatively hinged toilet seat and cover assemblies for use with non-standard bowls by A Seiderman – US Patent 4,087,884, 1978 – Google Patents