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WaterCAD chlorine wall and bulk decay rates

WaterCAD chlorine wall and bulk decay rates

WaterCAD chlorine wall and bulk decay rates

(OP)
Hi All:

I am using WaterCAD to analyze Constituent Concentrations (Chlorine) for a new water distribution system.  All the pipes in the system are 4in and 6in PVC pipes.  
Does anyone know what first order Bulk Reaction and Wall Reaction rates should I use in my model?  So far I found some values for the effective decay constant – units  of 1/time for different pipes depending on the diameter and age of the pipe, but for the input in WaterCAD I need to use a wall decay rate that has units of length/time.  Any thoughts?
 

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