Answers and Analysis

This knowledge base, updated to include the analyses from the 2003 through the most recent editions of the Uniform Plumbing and Mechanical Codes, continues to be a premier source for engineers, inspectors, students, contractors and tradesmen. Questions come from a broad base of users, and answers are informal interpretations of the Codes provided by a committee of code officials and special experts - they are clearly stated and to the point. This updated site combines the most pertinent analyses from the previous manual and presents them together with those based on the most recent publications of the Uniform Codes. This makes the Answers and Analysis database one of the most valuable tools you as a member can access wherever you have an internet connection.

The Answers and Analysis tool makes it easy to search for relevant questions and answers, either based on keywords or specific sections/chapters of the code. To find questions related to specific topics, type in the keyword(s), select the code and the year and click "Search". To search for questions related to a specific section, type the section in the Section field and click "Search". To search a specific chapter or appendix, select either the UPC or UMC Table of Contents, and select the chapter/appendix from the list.

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UPC Table Of Contents

Chapter	Title
1	Administration
2	Definitions
3	General Regulations
4	Plumbing Fixtures and Fixture Fittings
5	Water Heaters
6	Water Supply and Distribution
7	Sanitary Drainage
8	Indirect Wastes
9	Vents
10	Traps and Interceptors
11	Storm Drainage
12	Fuel Gas Piping
13	Health Care Facilities and Medical Gas and Medical Vacuum Systems
14	Firestop Protection
15	Alternate Water Sources for Nonpotable Applications
16	Nonpotable Rainwater Catchment Systems
17	Referenced Standards
Appendix A	Recommended Rules for Sizing the Water Supply System
Appendix B	Explanatory Notes on Combination Waste and Vent Systems
Appendix C	Alternate Plumbing Systems
Appendix D	Sizing Storm Water Drainage Systems
Appendix E	Manufactured/Mobile Home Parks and Recreational Vehicle Parks
Appendix F	Firefighter Breathing air Replenishment Systems
Appendix G	Sizing of Venting Systems
Appendix H	Private Sewage Disposal Systems
Appendix I	Installation Standards
Appendix J	Combination of Indoor and Outdoor Combustion and Ventilation Opening Design
Appendix K	Potable Rainwater Catchment Systems
Appendix L	Sustainable Practices
Appendix M	Sustainable Practices
Appendix N	Impact of Water Temperature on The Potential for Scalding and Legionella Growth

UMC Table Of Contents

Chapter	Title
1	Administration
2	Definitions
3	General Requirements
4	Ventilation Air
5	Exhaust Systems
6	Duct Systems
7	Combustion Air
8	Chimneys and Vents
9	Installation of Specific Appliances
10	Boilers and Pressure Vessels
11	Refrigeration
12	Hydronics
13	Fuel Gas Piping
14	Process Piping
15	Solar Energy Systems
16	Stationary Power Plants
17	Referenced Standards
Appendix A	Residential Plans Examiner Review Form for HVAC System Design
Appendix B	Procedures to be Followed to Place Gas Equipment in Operation
Appendix C	Installation and Testing of Oil (Liquid) Fuel-Fired Equipment
Appendix D	Fuel Supply: Manufactured/Mobile Home Parks and Recreational Vehicle Parks
Appendix E	Sustainable Practices
Appendix F	Geothermal Energy Systems
Appendix G	Sizing of Venting Systems and Outdoor Combustion and Ventilation Opening Design
Appendix H	Example Calculation of Outdoor Air Rate

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Questions matching UPC Chapter 15

2 results

UPC 2009 1602.0 UPC 2012 1602.0 UPC 2015 1502.0

Topic: Gray Water Systems

What are the codes and regulations relating to the use of kitchen-generated gray water?

The provisions for the installation of Gray Water Systems are found in Chapter 15 (2015), Chapter 16 (2009/2012) Alternate Water Sources For Non Potable Applications. Kitchen sink waste is not allowed in a Gray Water System.
The definition of Gray Water in Chapter 2 Definitions is untreated wastewater that has not come into contact with toilet waste, kitchen sink waste, dishwater waste or similarly contaminated sources. Gray water includes wastewater from bathtubs, showers, lavatories, cloth washers and laundry tubs.

UPC 2018 1501.5.1, 1502.3.4 1601.5.1, 1605.3.4

Topic: Cross Connection Test

1. Regarding the cross-connection test, what is meant by “annual”, once a year as stated in Table 1501.5, or interpreted as once a year in Section 1502.3 based on Table1501.5, or not less than once every four years as stated in Section 1502.3.4
2. Regarding the cross-connection test, what is meant by “annual”, once a year as stated in Table 1601.5, or interpreted as once a year in Section 1605.3 based on Table1601.5, or not less than once every four years as stated in Section 1605.3.4.

Comment:
1. Chapter 15 informs in Section 1501.5.1 that Table 1501.5 is applicable to alternate water source testing, specifically “Cross-connection inspection and test” with a frequency “After initial installation and every 12 months thereafter”. Section 1502.3 informs an annual inspection test shall be performed and Section 1502.3.4 informs an annual cross-connection test shall be performed not less than once every 4 years.
2. Chapter 16 informs in Section 1601.5.1 that Table 1601.5 is applicable to alternate water source testing, specifically “Cross-connection inspection and test” with a frequency “After initial installation and every 12 months thereafter”. Section 1605.3 informs an annual inspection test shall be performed and Section 1605.3.4 informs an annual cross-connection test shall be performed not less than once every 4 years.

1. Table 1501.5 of the 2018 Uniform Plumbing Code, gives a detailed description of the yearly maintenance schedule needed for an alternate water source, which includes an annual* cross-connection inspection and test. The annual inspection, as prescribed in Section 1502.3.4, states that the visual inspection and subsequent cross-connection test shall comply with the procedures found in Sections 1502.3.1 and 1502.3.2. If in the opinion of the Authority Having Jurisdiction, the annual inspection and test is not warranted do to site conditions, inspection and testing of the system may be extended to no than 4 years.
2. Table 1601.5 of the 2018 Uniform Plumbing Code, gives a detailed description of the yearly maintenance schedule needed for a non-potable rainwater catchment system, which includes an annual* cross-connection inspection and test. The annual inspection, as prescribed in Section 1605.3, states that the visual inspection and subsequent cross-connection test shall comply with the procedures found in Sections 1605.3.1 and 1605.3.2. If in the opinion of the Authority Having Jurisdiction, the annual inspection and test is not warranted do to site conditions, inspection and testing of the system may be extended to no than 4 years.

*Webster’s Dictionary defines Annual as “occurring or happening every year or once a year”.