Frozen shower drain

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Frozen shower drain
Author: Christopher (IL) I have an addition to my house that was built on a slab. For the past two years (I moved in 3 years ago), the drain in my rarely-used shower in the addition freezes when we have a spell of below zero weather. I am able to thaw it with a number of treatments of salty hot water but I am wondering if there is something I can do to prevent this from happening again this year?
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Re: Frozen shower drain
Author: hj (AZ) put RV antifreeze in the drain
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Re: Frozen shower drain
Author: Christopher (IL) It sounds toxic with pets???
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Re: Frozen shower drain
Author: hj (AZ) 1. You use RV antifreeze 2. HOw are pets going to drink water from the shower drain which is at least 6" below the floor, unless your pets are snakes or lizards, and even then there should be a slotted cover over the opening?
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Re: Frozen shower drain
Author: Christopher (IL) Where does one find RV antifreeze? Target? An auto supply store?
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Re: Frozen shower drain
Author: RRWA (WA) Walmart has it
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Re: Frozen shower drain
Author: steve (CA) RV antifreeze can be used in potable water systems. [msdssearch.dow.com]
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