UFC 3-420-01
25 October 2004
IPC CHAPTER 8 "INDIRECT/SPECIAL WASTE" SUPPLEMENTS.
A.
SECTION 802.1.5 Nonpotable clear-water waste. Add after the last
sentence: "Clear water discharge from hydraulic elevator sump pumps will be
connected to the sanitary sewer drainage system through an indirect waste pipe by
means of a 2-inch (50 mm) air gap or directly through an oil/water separator to storm
sewer, or to grade outside the building, each in accordance with discharge permits,
regulations, and statutes."
B.
Add "SECTION 802.1.6 Arms vault and storage areas. Through-the-wall
drains with discharge to grade will be provided in arms vaults and storage areas
requiring dehumidification, to dispose of condensate water from dehumidifiers. When
such drains are not practicable, floor drains will be installed inside the vaults or storage
areas to provide for water removal.
IPC CHAPTER 9 "VENTS" SUPPLEMENTS.
A.
SECTION 901.1 Scope. Add after the last sentence: "A Philadelphia (one
pipe), air admittance valve system, engineered vent system, or a sovent (aerator) type
system shall not be permitted. For Army and Air Force projects, design of vent
systems will conform to Figure 901-1. A branch vent, circuit vent, individual vent,
common dual vent, loop vent, relief vent, or stack vent, or a combination of two or more
of these vents, is considered adequate protection for trap seals."
B.
Delete "SECTION 917 AIR ADMITTANCE VALVES" in its entirety.
C.
Delete "SECTION 918 ENGINEERED VENT SYSTEMS" in its entirety.
A-23
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