Does anyone else's RO/DI filter make a hissing noise? It seem strange that nothing is loose and it still sounds like this. I am still new to Saltwater, so this might be a stupid question but just wondering. It is a coralife 50 gpd 4 stage ro/di ...Thanks, Joe
JoeRonda
The hissing noise is normal, you are squeezing pure water ions through microscopic sized openings at high pressure with no or little backpressure on the downstream side. Its going to make noise.
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