Del. Code Ann. tit. 16, § 7928
Back flow of sewage
47 Del. Laws, c. 184, § 25; 16 Del. C. 1953, § 7928;
Where a house drainage system may be subjected to back flow of sewage suitable provision shall be made to prevent its overflow in the building.
47 Del. Laws, c. 184, § 25; 16 Del. C. 1953, § 7928