Hot water tanks or boilers.

Del. Code tit. 16, § 7913
in effect
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Devices for heating water and storing it in boilers or hot water tanks shall be so designed and installed as to prevent all danger of explosion and also prevent a back flow of hot water through a meter connected with a public water supply.
Source: DE Code (Official Site)URL: https://delcode.delaware.gov/title16/c079/index.htmlFetched: 10/4/2026
Source: DE Code (Official Site)URL: https://delcode.delaware.gov/title16/c079/index.htmlFetched: 6/28/2026

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