Quote:
Originally Posted by summer home
My 375FL has the same drain... it is for the icemaker supply line
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I think this is your answer. I have the 3731FL also. Manual says to turn off ice maker in freezing weather as the water line has exposed section to the slide. There should be a water shutoff under the sink that you close and then open that drain to remove any water that's In the line. Mine was in the center of the underbelly so I added an elbow and section of pex clamped to the drivers side near the convenience center. I didn't want to have to crawl under to drain that in freezing and maybe snowy weather.