Storm water from roofs and paved areas, yards, courts and courtyards shall be drained into a storm water sewerage system or a combined sewerage system, but not into a sanitary sewerage system intended for sewage only. Inside roof leaders, downspouts and storm water house drains shall be designed and constructed as are other drainage pipes.

47 Del. Laws, c. 184, § ?26; 16 Del. C. 1953, § ?7929;