Water Closet Drain Pipe Size

Waste drain pipes for toilets in modern plumbing systems are either 3 inches or 4 inches in diameter.

Water closet drain pipe size.

Compare the fixture to the minimum sizes of drainage pipe by fixture table. The third option is the pvc or abs replacement closet repair flange which also inserts into the vertical cast iron drain pipe after the old flange is removed. That said we put together the following tables to serve as general guides for estimating a pipe s water flow capacity. The gasket tightens as the flange is turned in a clockwise rotation.

The wider the pipe the more waste it can move and the. In size but never less. Some older model toilets flushing over 1 6 gallons per flush are rated at 4 dfus. What size are toilet waste drains.

A reduced size flexible water connector installed between the supply pipe and the fixture shall be of an approved type. When cast iron soil pipe is used the connection is made by means of 4 in. 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. The waste for the water closet should be 4 in.

The vent pipes remove or exhaust sewer gases and allow air to enter the system so that the wastewater flows freely. Remember that the bottom of the flange must be set on top of the finished flooring and then screwed into the subfloor. Lead bend the pipe or bend being wiped to a brass ferrule which is caulked into the soil pipe and the floor connection generally being made by means. The drainpipes collect the water from sinks showers tubs and appliances.

If you have questions please call our drain wizard at 800 635 0384. Connections for water closet. The standard size for a toilet drain pipe is 3 inches in diameter but drains up to 4 inches in diameter are often used. Water closet s flushing 1 6 gallons or less are rated at 3 dfus drainage fixture units.

The drain pipe in your toilet carries waste away into the home s main drain line. For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter. The minimum size of a fixture supply pipe shall be as shown in table 604 5 the fixture supply pipe shall terminate not more than 30 inches 762 mm from the point of connection to the fixture. The waste pipes remove water and material from the toilet.

Lead pipe or a 4 in. The supply pipe shall extend to the floor or wall adjacent to the fixture. Water flow gpm gph based on pipe size and inside outside diameters. Regardless of your plumbing code the minimum drain size for a toilet is 3 inches.

Table 710 1 2 horizontal fixture branches and stacks a diameter of pipe inches.