// CODE SNIPPET
P-814.1 Hot Water Systems
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Check valves shall not be installed anywhere in the cold water supply pipe leading to an
existing water heating system unless:
- Suitable pressure relief valves and temperature relief valves are also installed; and
- Where copper tanks are used, a suitable vacuum relief valve is installed at or adjacent to the copper tank.
Related Code Sections
P-814.1 Water Supply and Distribution, Hot Water Systems
Check valves shall not be installed anywhere in the cold water supply pipe leading to an
existing water heating system unless:
Suitable pressure ...
Philadelphia Plumbing Code > 8 Water Supply and Distribution > P-814 Check Valves > P-814.1 Hot Water Systems
C503.5 [CE] Existing Buildings, Service Hot Water Systems
New service hot water systems that are part of the alteration shall comply with Section C404 ...
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Energy conservation measures for service hot water systems shall be in accordance with Sections R403.5.1 through R403.5.4 ...
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R502.1.1.3 [RE] Existing Buildings, Service Hot Water Systems
New service hot water systems that are part of the addition shall comply with Section R403.5 ...
2018 Philadelphia Energy Conservation Code > 5 [RE] Existing Buildings > R502 Additions > R502.1 General > R502.1.1 Prescriptive Compliance > R502.1.1.3 Service Hot Water Systems
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New service hot water systems that are part of the alteration shall comply with Section R403.5 ...
2018 Philadelphia Energy Conservation Code > 5 [RE] Existing Buildings > R503 Alterations > R503.1 General > R503.1.3 Service Hot Water Systems