Del. Code Ann. tit. 16, § 7919
Cleanouts in drainage systems
47 Del. Laws, c. 184, § 16; 16 Del. C. 1953, § 7919;
The drainage system shall be provided with an adequate number of cleanouts so arranged that in case of stoppage the pipes may be readily accessible.
47 Del. Laws, c. 184, § 16; 16 Del. C. 1953, § 7919