Toilet Floor Drain Size

The standard size for a toilet drain pipe is 3 inches in diameter but drains up to 4 inches in diameter are often used.

Toilet floor drain size. Ideally 8 1 4 inches above the floor. If a drain line is nearby you may choose to run a pipe to it rather than running a new line. What size are toilet waste drains. Measured from centerline running vertically through the center of the toilet supply line hole should be 6 inches to the side of centerline.

The drainpipes that connect to floor drains must have a minimum vent size of 1 1 2 inches. The number of units on one drain pipe helps to calculate the size of pipe needed. Commercial plumbing drains are measured in inches. Because the floor drain connects to the sewer system sewer gas can drift up the pipe and enter your home through the drain.

The toilet flange also known as a closet flange is the part of the toilet that secures the unit to the floor which connects to the drain pipe. Usually made of pvc rubber or metal this piece is circular in shape and usually secured in place with a few bolts. A toilet is considered as six units because of how much water it discharges at once. Regardless of your plumbing code the minimum drain size for a toilet is 3 inches.

Toilet rough in details. The drain must connect to a trap that blocks the gas by catching water in a curving section of pipe creating an airtight barrier. Flanges are available in 3 or 4 inch diameters depending on the particular diameter of the drain pipe on which it will be installed. The toilet s drain size.

The drain pipe connects to the flange which mounts the toilet itself and this flange is usually built to connect to 3 inch schedule 40 toilet drain pipe. Water closet s flushing 1 6 gallons or less are rated at 3 dfus drainage fixture units. Some older model toilets flushing over 1 6 gallons per flush are rated at 4 dfus. However it may be difficult to run a toilet s 3 inch or 4 inch drain to an.

In most homes pvc drain pipe is used instead of metal pipe. The wider the pipe the more waste it can move and the. If the new bathroom is on the second floor the bathroom s main drain will have to travel through the wall on the first floor and down to the basement or crawlspace. Either size should be enough for any toilet which have standard discharge outlet hole sizes just over 2 inches.

Cold water only pipe creates one hole between 5 and 10 inches above the floor supply line horizontal. Check toilet to confirm location water supply connection.