Water Closet Drain Pipe Size

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

Water closet drain pipe size.

Regardless of your plumbing code the minimum drain size for a toilet is 3 inches. The drain pipe in your toilet carries waste away into the home s main drain line. The waste pipes remove water and material from the toilet. The vent pipes remove or exhaust sewer gases and allow air to enter the system so that the wastewater flows freely.

The gasket tightens as the flange is turned in a clockwise rotation. Some older model toilets flushing over 1 6 gallons per flush are rated at 4 dfus. Remember that the bottom of the flange must be set on top of the finished flooring and then screwed into the subfloor. Compare the fixture to the minimum sizes of drainage pipe by fixture table.

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. Connections for water closet. What size are toilet waste drains. The supply pipe shall extend to the floor or wall adjacent to the fixture.

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 waste for the water closet should be 4 in. Lead pipe or a 4 in. A reduced size flexible water connector installed between the supply pipe and the fixture shall be of an approved type.

Water closet s flushing 1 6 gallons or less are rated at 3 dfus drainage fixture units. For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter. The standard size for a toilet drain pipe is 3 inches in diameter but drains up to 4 inches in diameter are often used. If you have questions please call our drain wizard at 800 635 0384.

The toilet s drain size. 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. Water flow gpm gph based on pipe size and inside outside diameters. Waste drain pipes for toilets in modern plumbing systems are either 3 inches or 4 inches in diameter.

In size but never less. The drainpipes are made of cast iron galvanized pipe copper or plastic. The drainpipes collect the water from sinks showers tubs and appliances. The minimum size of any building drain serving a water closet shall be 3 inches.

That said we put together the following tables to serve as general guides for estimating a pipe s water flow capacity.