Hi this is Jerica from InSinkErator Customer Service. At the present time, there are no national standards regarding such compatibility. In the absence of a nationally recognized standard, InSinkErator can make no claim regarding our products’ compatibility with other filtration systems and we can neither discourage nor recommend the use of such systems in conjunction with our Instant Hot Water Dispensers.
However, we can share some facts with you.
RO Systems produce highly purified water which makes the water very “aggressive.” That is why RO faucets are completely plastic. Our dispenser faucets are brass constructed. Additionally, RO System can produce very low water flow rates, which hinder the performance of the instant hot water dispenser system. At water line pressures significantly lower than 20PSI, the dispenser may “drip”. Either of these two situations could lead to dissatisfaction, which is why we’ve made filtration systems designed specifically for use with our Instant Hot Water Dispensers. For more information regarding our filtration system, you may refer to this link:
http://www.insinkerator.com/en-us/H....
If you have further questions, you may reply to this thread or you may call InSinkErator AnswerLine at 1 (800) 558-5700. Thank you.