Water Closet Pipe Size

A reduced size flexible water connector installed between the supply pipe and the fixture shall be of an approved type.

Water closet pipe size.

Water velocity should not be greater than 2 438m s at valve seat to prevent noise and erosion. The closet bend actually has two diameters because it connects the 3 inch drain pipe to the 4 inch drain line. Closet bend 4 3 closet bend connects to 3 inch schedule 40 pipe. Unit sizes provided in the table 1 and table 2 is in mm but the size of pipes in the chart is in inch.

The listed fixture unit values represent their load on the cold water building supply. The fixture supply pipe shall terminate not more than 30 inches 762 mm from the point of connection to the fixture. So pipe area should be at least equal to water flow rate divided by eight. The closet bend installs below the toilet and connects to the main drain stack.

Most toilet installation parts are made to fit these pipe sizes. The closet bend is also 3 inch pipe however there are various closet bend sizes. Water supply fixture units wsfu and minimum fixture branch pipe sizes. Toilet water supply line 1 2 inch copper pipe or plastic pipe routed from main water line or 1 2 inch cold water line.

The top of the closet bend is 3 inch diameter pipe while the other end is 4 inch. This pipe fitting is set under the toilet in the floor joists or ground in toilets on concrete slabs. The supply pipe shall extend to the floor or wall adjacent to the fixture. Appliances appurtenances and fixtures not referenced in the table below shall be permitted to be sized by reference to fixtures having a similar flow rate and frequency of use.

The minimum size of a fixture supply pipe shall be as shown in table 604 5. A reducing closet bend configuration or a 4 3 closet bend has two different sized ends to connect two different sized pipes.