Objective: • Design and Install non-seasonal Greywater System at the South
Co-Op
•Meet all City and State Requirements
Water source
Rainwater
• Hand washing sinks
• Rainwater
Water Sink • Toilet
The Filter Brac Systems RGW-250
Picture Gallery
Required Work
Toilet Use
Average of 810
Costumers/day
• 15% of costumers use the restroom
• About 100 gal/day water needed to
flush toilets
Hand Washing Sink Use
• Greywater from sinks
can produce 31% (31
gal/day) of toilet water
Figure 1: Public
bathroom
at the south Co-Op
Figure 3: The final South Corvallis Co-Op Greywater Recycle Piping Schematic
6’ Total Roof Area = 1022 ft2
Co-Op Roof
27.75’
36’
Figure 2: The 1500
gallon rainwater
encatchment tank
0
20
40
60
80
100
120
140
160
180
200
0
1
2
3
4
5
6
7
8
9
Ra
infa
ll (
in/
mo
nth
)
Month
Accumlated rainwater
(gal/dayl)
Average monthly rainfall (in)
)
Ra
inw
ate
r (g
al/
da
y)
Figure 4:
Rainwater
volume in the
tank throughout
the year
Figure 3: The
monthly
rainfall and
volume of
rainwater
collected for
reuse.
0
200
400
600
800
1000
1200
1400
1600
Vo
lum
e o
f w
ate
r in
th
e
Ra
inw
ate
r ta
nk
(g
al)
Month
• 1500 gallon Rainwater tank
• July – Sept. tank will be dry and city
water will be needed to flush toilets
• IAPMO Certified and approved by
the State of Oregon
• Automated valve system
• Automated chlorination
• Backflow prevention
• Pump and greywater storage tank
• Overflow valve
• Mesh filter
Figure 5: A schematic
of the filtration system
Dave Eckert, Paul Cooke, Jason Blake-Beach, Peter Byrne,
Todd Jarvis, and Dr. Phil Harding
Acknowledgments
Greywater: By Oregon Law, greywater is defined as
water produced from hand washing sinks,
showers, and washing machines.
Permitting • Oregon legalized greywater recycle
in 2008
• Greywater legislature (OPSC 08-01
through OPSC 08-04)
• Filed and received plumbing permits
for both Brac and Rainwater tank
• Filed a flood plane development
application
• Construct system housing
• Permit approval for housing
• Controls
• Outreach
• Gained access to plumbing through
outer wall
• Compiled water inventory and
produced water consumption model
• Repaired break in sewer line and
installed tee fitting for Brac overflow
• Obtained three city plumbing permits
for greywater system.
• Installed Brac System and Sump
Figure 7: System
Housing
The Team: Brittany Park, Dennis Petersen, and Jon Isaacs
Accomplishments
Left to right, top to bottom: a) Camera sewer line inspection b)
The open Co-Op wall c) Connecting overflow into main line d)
Installed greywater system
Hand Washing Sinks
High Daily Volume 60 gal
Low Daily Volume 20 gal
Average Daily Volume 31 gal
Toilet Use
High Daily Volume 120 gal
Low Daily Volume 45 gal
Average Daily Volume 96 gal
Daily estimates obtained from flow
monitoring used to size Brac System
