Dwv in the crawl space, will it freeze?

[Eltonmyers]

Here in Iowa the frost line is 4' so I am replacing this 4" CI pipe that has totally rotted out, with schedule 40 pvc , some of the CI was in the ground, out of 16' maybe 4' was in the ground and there is one heat run running through this crawl space but I don't think it's heated, and the crawl space is attached to the basement but not real accessible, I am only asking because this will get inspected, so do I need to bury it 48" in the crawlspace

 

[Terry]

That's a good question. I work on the West side of Washington where the frost line is 2 feet. We don't get frozen pipes in our crawl spaces here unless they are right in front of a vent. And some of our waste lines are on the outside of the homes.

Any Iowa plumbers here?

 

[Sponsor]

 

[hj]

Drain lines do NOT "freeze", unless they are plugged up and full of water or there is a small constant leak so the ice can build up. It would not help if you buried the lines 48" deep, but the sewer was only 30" below ground.

 

[Eltonmyers]

I ask an inspector from a different town and he said treat it like ground work so I called the inspector from the town I was in and he said as long as i just cut and replace without changing direction it would be fine as long as it was secured

 

[Cacher_Chick]

A decent crawl space is insulated around the exposed exterior walls and will not freeze under normal conditions. The ground near the center of the house will rarely fall below 45-50F.