There is a newer version of the Delaware Code
2015 Delaware Code
Title 16 - Health and Safety
CHAPTER 79. BASIC PLUMBING PRINCIPLES
§ 7921 Adequate air circulation.
16 DE Code § 7921 (2015) What's This?
The house drainage system shall be so designed that there will be an adequate circulation of air in all pipes and no danger of siphonage, aspiration or forcing of trap seals under conditions of ordinary use.
47 Del. Laws, c. 184, § 18; 16 Del. C. 1953, § 7921.;
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