Kitchen water freezes only
Assuming you need to insulate the low point drains, an earlier post noted this solution, which I have used with good success.
Get a pool noodle and cut two segments to fit over the low point drains, which in my case were about 8" in length. My drains aligned such that I could duct tape the two segments together after I finished some minor customization. Insulate the bottom 1-2" of each segment and duct tape over the bottom.
When freezing is a concern I activate two 'Hot Hands' hand warmer packets and slide one into each noodle segment and then place the noodle segments over the drains. The hand warmers are good for about 10 hours and can be easily replaced as needed.
I apologize for not providing pictures... my Avalanche is in storage.
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Ron & Wendy (bride of 33 years)
2017 Avalanche 300RE
2012 RAM Laramie 2500 6.7 Cummins w/RamBox - B&W Turnover - Anderson Ultimate GN Connection
Air Lift Load Lifter 5000 airbags
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