Given: 6000 square foot roof; 2″ per hour rainall; In accordance with Appendix D of the Uniform Plumbing Code what is the minimum size vertical pipe from one drain to adequately handle the drain.

Given: 6000 square foot roof; 2″ per hour rainall; In accordance with Appendix D of the Uniform Plumbing Code what is the minimum size vertical pipe from one drain to adequately handle the drain.