MIL-HDBK-1165
To Vents
Backwater
Valve
Shutoff Valve
Treated
Graywater
3-Way Valve
Source
Approved
Watertight
Tank
Overflow
(no valve)
DANGER
Unsafe
Water
To Irrigation System
To Building Drain or Sewer
Source: Proposed Code Change to a Section and/or Sections
o f t h e U P C - U S P C - U S E C, Submitted to the National Association
of Plumbing and Mechanical Officials, Los Angeles, CA,
February 1992.
Figure 21
Typical Graywater Piping and Distribution System
With careful planning, a wastewater recycling and
treatment system can provide significant water savings and reduce
the expense of purchasing and discharging facility water.
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