Insane with the membranes.

Thanks Chuck. Exactly what I thought too, and yes cleaning has never helped. We are seeing membranes from the vendor last less than a year, sometimes they are basically RGAd back after we install them as a complete housing (meaning we don't replace the seals ourselves). A few are great and last years, but lately it's been overall poor quality. I believe there's either a manufacturing defect or as was accidentally said from the vendor once they actually take apart and inspect each membrane before adding the seals and shipping to the customer which seems ludicrous to me. Is it possible to order membranes directly from the manufacturer of the membranes (not the equipment) or find an alternate? No experience outside of dealing with the vendor.

Is there any indication in your experience that heat disinfections can foul a membrane more quickly than chemical regimen? Why do you choose to use chemical over heat disinfections, assuming you have the capability? Or are they just not heat rated machines to begin with?

Hmmm perhaps we should trial once a month Minncare to see if we see any improvement, on top of our weekly heats. I still think the membrane issue is related to as discussed membrane quality like damage or pinholes, or bypass with the seals. But willing to try anything, perhaps some will improve. Also, we had an improvised filter for loose carbon on the 300H machines to the inlet of the RO unit from the GAC. There is no such thing currently on our EONs and have seen basically membranes go out after a carbon block change even with excessive flushing/outgassing. So I don't know if loose carbon is getting through to the membrane and causing damage.