// CODE SNIPPET
1310.6 Backfilling and Trenching
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The installation procedure
for underground piping shall protect the piping from
physical damage while being backfilled. [NFPA
99:5.1.10.11.5.2, 5.3.6.13.2]
Underground
piping shall comply with the following where protected
by a conduit, cover, or other enclosure:
- Access shall be provided at the joints for visual inspection and leak testing.
- The conduit, cover, or enclosure shall be self-draining and not retain groundwater in prolonged contact with the pipe. [NFPA 99:5.1.10.11.5.3, 5.3.6.13.3]
Buried piping that will be
subject to surface loads shall be buried at a depth that
will protect the piping or its enclosure from excessive
stresses. [NFPA 99:5.1.10.11.5.4, 5.3.6.13.4]
The minimum backfilled
cover above the top of the piping or its enclosure for
buried piping outside of buildings shall be 36 inches
(914 mm), except that the minimum cover shall be permitted to be reduced to 18 inches (457 mm) where
there is no potential for damage from surface loads or
surface conditions. [NFPA 99:5.1.10.11.5.5, 5.3.6.13.5]
Trenches shall be excavated so
that the piping or its enclosure has firm, substantially
continuous bearing on the bottom of the trench. [NFPA
99:5.1.10.11.5.6, 5.3.6.13.6]
Backfill shall be
clean, free from material that is capable of damaging
the pipe, and compacted. [NFPA 99:5.1.10.11.5.7,
5.3.6.13.7]
A continuous warning tape or
marker placed immediately above the piping or its
enclosure shall clearly identify the pipeline by specific
name. [NFPA 99:5.1.10.11.5.8, 5.3.6.13.8]
A continuous warning means shall
be provided above the pipeline at approximately one-half
the depth of burial. [NFPA 99:5.1.10.11.5.9,
5.3.6.13.9]
Where underground piping is
installed through a wall sleeve, the outdoor end of the
sleeve shall be sealed watertight to prevent the entrance
of groundwater into the building. [NFPA
99:5.1.10.11.5.10, 5.3.6.13.10]
Related Code Sections
1310.6 Health Care Facilities and Medical Gas and Medical Vacuum Systems, Backfilling and Trenching
The installation procedure
for underground piping shall protect the piping from
physical damage while being backfilled. [NFPA
99:5.1.10.11.5.2 ...
California Plumbing Code 2016 > 13 Health Care Facilities and Medical Gas and Medical Vacuum Systems > 1310.0 Installation of Piping > 1310.6 Backfilling and Trenching
1310.6 Health Care Facilities and Medical Gas and Medical Vacuum Systems, Backfilling and Trenching
The installation procedure for underground piping shall protect the piping from
physical damage while being backfilled. [NFPA 99:5.1.10.11.5 .2 ...
California Plumbing Code 2019 > 13 Health Care Facilities and Medical Gas and Medical Vacuum Systems > 1310.0 Installation of Piping > 1310.6 Backfilling and Trenching
1310.6.5 Health Care Facilities and Medical Gas and Medical Vacuum Systems, Composition of Backfill
Backfill shall be
clean, free from material that is capable of damaging
the pipe, and compacted. [NFPA 99:5.1.10.11.5.7,
5.3.6.13.7] ...
California Plumbing Code 2016 > 13 Health Care Facilities and Medical Gas and Medical Vacuum Systems > 1310.0 Installation of Piping > 1310.6 Backfilling and Trenching > 1310.6.5 Composition of Backfill
1310.6.1 Health Care Facilities and Medical Gas and Medical Vacuum Systems, Conduit, Cover, or Enclosure
If underground piping is protected by a conduit, cover, or other enclosure, the following requirements shall be met:
Access shall be provided ...
California Plumbing Code 2019 > 13 Health Care Facilities and Medical Gas and Medical Vacuum Systems > 1310.0 Installation of Piping > 1310.6 Backfilling and Trenching > 1310.6.1 Conduit, Cover, or Enclosure
1310.6.1 Health Care Facilities and Medical Gas and Medical Vacuum Systems, Conduit, Cover, or Enclosure
Underground
piping shall comply with the following where protected
by a conduit, cover, or other enclosure:
Access shall be provided at the joints ...
California Plumbing Code 2016 > 13 Health Care Facilities and Medical Gas and Medical Vacuum Systems > 1310.0 Installation of Piping > 1310.6 Backfilling and Trenching > 1310.6.1 Conduit, Cover, or Enclosure