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[Subject_Name_Here]

Hi all,

I'm considering installing a bulk sodium hypochlorite delivery system and was wondering if anyone has worked on one in the past and would like to share some experiences or lessons learned... The tank will only be around 300 gallons (likely opaque polyproylene but not sure if open or closed to atm), stored indoors to keep away summer heat and UV light. Piping will be CPVC. The transfer pump will be PVC. I'll filter using polypropylene 0.5-1 micron on the inlet to reduce metal contaminants that catalyze decomp.

 

My biggest worry is the decomposition, which is 2nd order and has multiple pathways. Based on some public data from Oxychem I'll lose 2% within the first 50 days for a 13% w/w NaOCl stored at room temperature and it's supposed to last an entire year. I'm considering no longer testing NaOCl concentration and only testing available chlorine. I'm told that's the best performance indicator for disinfecting purposes, but it would be great if someone could corroborate that claim.

 

Any information on success slowing decomp, materials, tank ventilation, or whether or not this should be a user loop setup or direct shot to each point of use to prevent circulating would be much appreciated. I've already read the online material available from Powell and Oxychem.

 

Thanks