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deadeye916 wrote:
What do you do when temps get below freezing?
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I have a similar filter system setup that I put inside the cargo area of my 5er when the temp is going to be below freezing. I place mine inside of a plastic tub, cutting holes in the walls of the tub for the hoses to enter and exit. I then purchased a water leak alarm "Basement Watchdog Battery Operated Water Alarm".
http://www.lowes.com/pd_117272-84862-BWD-HWA_0_?productId=1005609&Ntt=water%20alarm& Ntk=i_products&pl=1¤tURL=/pl__0__s?newSearch=true$Ntt=water%2 0alarm$y=0$x=0
The plastic tub will catch any water drips or leaks, within reason. The water alarm will notify you of any water spills in the tub before the water fills the tub and spills into the cargo area.
I also put a small electric heater in the cargo area which is controlled by a thermostat so you can set the desired temperature. This protects the water filter system and all of the water lines in that area from freezing.
I put heat cable wrapped with insulation on my outside water line and faucet. I have filtered water all winter long.
http://www.lowes.com/SearchCatalogDisplay?storeId=10151&langId=-1&catalogId=10051&am p;N=0&newSearch=true&Ntt=heat+cable&x=0&y=0
I hope this helps.