What branch size is indicated for a service sink?

The ideal branch size for a service sink is typically associated with the plumbing code requirements for waste lines, which dictate the necessary diameter to efficiently handle wastewater and solid waste. A 3" branch size is commonly specified for service sinks because it allows for increased drainage capacity, helping to prevent clogs and ensuring proper flow. This larger diameter is also suitable for the type of waste encountered in service sinks, which can include larger debris as well as a higher volume of liquids.

In plumbing systems, the choice of pipe size is critical to avoid drainage issues and maintain adequate flow rates. Service sinks are often used in commercial or industrial settings, and the expected volume and nature of waste justify the need for a 3" branch to accommodate these demands effectively. This sizing helps maintain compliance with plumbing codes and reduces the likelihood of backups or slow drainage, particularly in high-use environments.