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// CODE SNIPPET

707.10 Trenching Requirements

Green Construction Code 2012 of Maryland > 7 Water Resource Conservation, Quality and Efficiency > 707 Rainwater Collection and Distribution Systems > 707.10 Trenching Requirements
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All water service piping, including piping containing rainwater, shall be separated from the building sewer by 5 feet (1524 m) of undisturbed or compacted earth. Water service pipes, potable and nonpotable, shall not be located in, under or above cesspools, septic tanks, septic tank drainage fields or seepage pits. Buried rainwater collection and distribution piping shall comply with the requirements of Section 306 of the International Plumbing Code for support, trenching, bedding, backfilling and tunneling.
Exceptions:
  1. The required separation distance shall not apply where the bottom of the water service pipe within 5 feet (1524 mm) of the sewer is a minimum of 12 inches (305 mm) above the top of the highest point of the sewer and the pipe materials shall comply with the International Plumbing Code for such applications.
  2. Water service pipe is permitted to be located in the same trench with a building sewer, provided such sewer is constructed of materials that comply with the International Plumbing Code for such installations.
  3. The required separation distance shall not apply where a potable or nonpotable water service pipe crosses a sewer pipe provided the water service pipe is sleeved to not less than 5 feet (1524 mm) horizontally from the sewer pipe centerline on both sides of such crossing with pipe materials that comply with the International Plumbing Code for such applications.
  4. Irrigation piping located outside of a building and downstream of the backflow preventer is not required to meet the trenching requirements where rainwater is used for outdoor applications.

Related Code Sections


707.10 Water Resource Conservation, Quality and Efficiency, Trenching Requirements
Code for support, trenching, bedding, backfilling and tunneling. Exceptions: The required separation distance shall not apply where the bottom ...
Green Construction Code 2012 of Maryland > 7 Water Resource Conservation, Quality and Efficiency > 707 Rainwater Collection and Distribution Systems > 707.10 Trenching Requirements
708.10 Water Resource Conservation, Quality and Efficiency, Trenching Requirements
piping shall comply with the requirements of Section 306 of the International Plumbing Code for support, trenching, bedding, backfilling ...
Green Construction Code 2012 of Maryland > 7 Water Resource Conservation, Quality and Efficiency > 708 Gray Water Systems > 708.10 Trenching Requirements
709.8 Water Resource Conservation, Quality and Efficiency, Trenching Requirements
reclaimed water piping shall comply with the requirements of Section 306 of the International Plumbing Code for support, trenching, bedding, backfilling ...
Green Construction Code 2012 of Maryland > 7 Water Resource Conservation, Quality and Efficiency > 709 Reclaimed Water Systems > 709.8 Trenching Requirements
1301.11 Nonpotable Water Systems, Trenching Requirements for Nonpotable Water Piping
with the requirements of Table 605.4. Nonpotable water pipe is permitted to be located in the same trench with a building sewer , provided that such sewer ...
Plumbing Code 2018 of Maryland > 13 Nonpotable Water Systems > 1301 General > 1301.11 Trenching Requirements for Nonpotable Water Piping
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