Yes, they are RO/DI safe! That's the main reason I sourced them. They are good to .7Mpa or about 101PSI. Way higher than water systems. You can use 2 in a double block configuration to ensure reliability, but like anything, nothing is 100% reliable forever.
FYI I will just be using one on my RO/DI unit for the ATO
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Dan Pesonen
Umm, a tank or 5
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