RO/DI filter changing and bypass valve flushing question(s)

[Tony Tech]

Hi everyone. I had a ton of parts laying around from a previous DIY dosing system project and decided to install some bypasses. Here are the questions and thank you in advance.

1. I have replaced all filters including the membrane, what bypasses should i use and what would be the specific recommended times for flushing?

2. when using the system after numerous idle days what bypasses and recommended times for flushing?




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[Tony Tech]

ultimately installed all filters. opened the membrane bypass and flushed until the water ran clear. closed membrane bypass
opened DI bypass and flushed for 8 quarts. closed di bypass. (water tested @ 15 tds)
discarded 5 gallons of product water. (even before discarding the 5 gallons water was coming out at 0 tds)