Freeze Prevention Heat Tape

[slowgsxr97]

I have never had water turned on to this property. The main supply line and the trap for the bathtub is in the crawl space. The crawl space is vented to the outside air. I need to keep both from freezing. I purchased a 6' section of Frost King heat cable. It says it is usable on copper and plastic, but in the same paragraph it says not to use on drain lines. Is there any way to keep the trap from freezing? I plan on renting this place out soon and trying to avoid any issues before they start. Any advice? This is my first crawl space house.

 

[WorthFlorida]

Crawl spaces under a home are warmer than you might think. The foundation is below the frost line and stored heat in the the ground will raise into the space. You only need to keep it above 33-34 degrees. PVC has a low max operating temperature of 140 degrees and it is why heat tape is not recommended. If the crawl space has ventilation grills, they should be closed for the winter, maybe for two months during Jan & Feb when deep freeze temps and high winds for the Midwest are likely. I lived in Algonquin, Illinois so I’m familiar with the weather.
The easiest thing to do is hang a drop light near the trap with a halogen light bulb (25 watt). This is common way for well heads but usually with a 60-100 watt bulb. If the tub is used regularly, the warm water will melt any ice if it ever builds up.

 

[Sponsor]

 

[Reach4]

Get one or two thermometers that have outdoor sensors. Put the sensor(s) down there, and see how cold it gets. I know you won't be testing during the coldest times, but try to compensate.

The drain lines, except for the trap, are normally empty.

 

[sara1225]

You can use HEATIT JHSF1-CT self regulating heat tape. The water proof grade is IP 68.
See this link:
http://heatitcable.com/product/heatit-jhsf1-ct-self-regulating-pre-assembled-pipe-heating-cable

 

[slowgsxr97]

Thanks for the replies. I have had some unexpected things pop up, and haven't got this done yet.

I did buy this in a 6' length. It says its thermostatically controlled. I really wish I had a wireless thermometer in there right now, going to be in the negatives in the morning, curious what it actually is.

https://www.menards.com/main/plumbi...r-pipe-heating-cable/hc6a/p-1444444946552.htm