RO/DI Winter Maintenance

john.m.cole3

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Hello everyone. Have you all started getting some cold weather. Here in West Texas, we have already had our first freeze and are expecting another one this coming Saturday. This past week, our house has been trying to figure out good turkey leftover recipes and we are almost done with the last of our sweet potato pie. We have 3.5 more weeks til Christmas, so I figured we could focus on our reefs again.

If you're like me, you keep your RO/DI filter in the garage since you flooded the kitchen 4 times last summer. what will happen if your filters that keep water in them freeze, expand, and crack your unit? what happens if the RO membrane freezes? Also, how has your water production been affected by this colder weather?

I have a plan.

My RO/DI is kept in a storage bin so I can easily pull it out of the garage when I need to make water. My first move is to replace my filters. I want to avoid wrenching on filter canisters that might be cold and brittle. I'm just trying to eliminate the possibility of a piece of plastic breaking off if I have some depleted DI resin that needs to be changed. Next, I'll keep my filter covered with a blanket. Seriously! I don't want my filter freezing or even getting the chills for that matter. I have a water proof shipping blanket I throw on the floor when I do water changes and maintenance. I keep it in the garage, so that will be convenient. I also will disconnect to my supply which is the spicket out back, and I'll remove my waste line so it does not freeze and clog. I'm even considering making my source water come from my kitchen so I can influence the temperature of the water entering the filter. that does it for me. I think I'm set.

Some things to consider... My filter is from BRS and they say the gpd output depends on the temp. Their units run optimally at 77 degrees. Be prepared for water production to slow down. DO NOT DO NOT put an electric blanket or any other direct warmer on your unit to make it perform better. RO membranes break down at 113 degrees and this is the fastest way to demolish your filters. That's all I've got.

Help the rest of us out if you have any pointers to keep your RO/DI filter humming along during these cryogenic times, Post em here. Thanks everyone!

200412-6-stage-universal-water-saver-plus-ro-di-diagram.jpg
 
I keep mine in climate controlled garage and another in my basement for another tank. Way too lazy for all that mess you just posted!
 

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