**Radial Flow Settling Tank Stats**
Radial flow settling tank size 32 gallons
Flow rate 150GPH (2.5GPM)
Tank retention time 12.8 minutes
Solids Lifting Overflow (SLO) pipe diameter 3 inches reduced to 1.5 inches (1.77 in^2)
Stilling well diameter 4 inches (12.56 in^2 7.1 times bigger than SLO pipe)
Settling tank diameter ~20 inches (314 in^2 177 times bigger than SLO pipe)
Effluent weirs 48 1/2 inch diameter (5.42 in^2 5.32 times bigger than SLO pipe)

**RFS Flow Analytics (Velocities)**
Influent SLO pipe 326 inches / min
Stilling well 46.0 inches / min
Settling tank 1.84 inches / min (0.03 inches / sec)
Effluent weirs 61.3 inches / min (1 inch / sec) over 22 inches

**Misc Items**
At fish tank, SLO pipe passes through a 3" bulkhead fitting
At settling tank, SLO pipe passes through a 1.5" uniseal
At settling tank, effluent pipe passes through a 1.5" uniseal also
Due the system hydraulics, the RFS tank had to be buried 6" in order to have an effective operating hydraulic gradient line
Burying the RFS does help out with insulating the tank in hot (100F +) and cold (freezing and below) temperature days

**Lessons Learned**
Had to change the effluent weirs from a longitudinally half cut pipe to 48 1/2 inch holes for less effluent flow velocity
Hard to clean out the RFS since a clean out and drain were not designed into the RFS

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