How are drainage systems sized according to the NYC Plumbing Code?

How are drainage systems sized according to the NYC Plumbing Code?

• A. By square footage of the building
• B. Based on the number of fixture units served
• C. By the length of the drainage pipe
• D. Based on anticipated water usage

Answer: (B)

The sizing of drainage systems according to the NYC Plumbing Code is based on the number of fixture units served. This method involves calculating the total load or demand that the drainage system must accommodate, which is expressed in fixture units. Each type of plumbing fixture has a specific value assigned to it, which reflects the likelihood of water flow and waste generation from that fixture. Using fixture units allows for a standardized approach to determine the capacity required for drainage pipes, ensuring that they can handle the expected wastewater flow during peak usage times without frequent backups or failures. This focus on fixture units provides a more accurate assessment of the system's requirements than other factors such as square footage or anticipated water usage, which may not directly correlate with the actual drainage needs.

The sizing of drainage systems according to the NYC Plumbing Code is based on the number of fixture units served. This method involves calculating the total load or demand that the drainage system must accommodate, which is expressed in fixture units. Each type of plumbing fixture has a specific value assigned to it, which reflects the likelihood of water flow and waste generation from that fixture.

Using fixture units allows for a standardized approach to determine the capacity required for drainage pipes, ensuring that they can handle the expected wastewater flow during peak usage times without frequent backups or failures. This focus on fixture units provides a more accurate assessment of the system's requirements than other factors such as square footage or anticipated water usage, which may not directly correlate with the actual drainage needs.