Casual Toilet Drain Size
This measurement is 15 inches.
Toilet drain size. It would be lie trying to flow a sample in a ten inch pipe with just one gallon of water. Regardless of your plumbing code the minimum drain size for a toilet is 3 inches. The standard size for a toilet drain pipe is 3 inches in diameter but drains up to 4 inches in diameter are often used.
Take some quick measurements and pick up a pressure drain that works for your situation. You need a 14 to 18 per foot thats either one inch in four feet or one inch in eight feet. Typically 3-inch pipes carry the water to the toilet but a 4-inch pipe may be used to move wastewater out of a house to a sewer or septic tank.
The wider the pipe the more waste it can move and the less likely it. These plugs arent expensive at all. This is the homes main drain line the drain pipe connects to this pipe.
Some older model toilets flushing over 16 gallons per flush are rated at 4 DFUs. In this way what size should a toilet drain be. The standard size for a toilet drain pipe is 3 inches in diameter but drains up to 4 inches in diameter are often used.
Flappers comes in two sizes two inch and three inch. Water closets flushing 16 gallons or less are rated at 3 DFUs drainage fixture units. There really is no advantage to this size unless your toilet has a three inch drain hole opening in the bottom.
Waste drain pipes for toilets in modern plumbing systems are either 3 inches or 4 inches in diameter. Thats the minimum you can have more. The curb shall be not less than 2 inches 51 mm and not more than 9 inches 229 mm deep when measured from the top of the curb to the top of the drain.