This is about a project in an 82 year old building built on a concrete footing but with no crawl space underneath. The available plan is to bring a 2" diameter abs sewage pipe from a kitchen sink through the foot thick adobe block wall, hopefully on a very slight down slope. It will go outside the wall for about 9 inches, then through a 90 degree elbow, then straight down about 30 inches where it will enter the ground. About 20 feet further on it will connect to existing 4 inch pvc sewage pipe.
This is through a south facing wall with no obstructions to the sky, thus to the sun during the day. Summer air temperatures reaches at least 110 F some days. My real concern is that for around two months each winter the temperature drops as low as 20 F each night. It almost always raises above freezing during each day but the pipe will be exposed to below freezing air temperatures for six or eight hours every night. Snow is quite rare.
I read that abs is damaged by freezing. It is not expected that the exposed pipe will have standing water in it at any time but it still seems likely for the abs itself to chill below freezing if not protected for some time almost every night during that period.
I know insulation can be wrapped around the exposed pipe but I don’t know how much insulation might be necessary to prevent the abs from chilling to freezing nor if the same insulation will prevent the pipe from getting warm enough during the colder winter days to be ready for the next night.
Is pipe wrap insulation around the pipe likely to be sufficient?
If so, how thick?
If not, what might be?
This is through a south facing wall with no obstructions to the sky, thus to the sun during the day. Summer air temperatures reaches at least 110 F some days. My real concern is that for around two months each winter the temperature drops as low as 20 F each night. It almost always raises above freezing during each day but the pipe will be exposed to below freezing air temperatures for six or eight hours every night. Snow is quite rare.
I read that abs is damaged by freezing. It is not expected that the exposed pipe will have standing water in it at any time but it still seems likely for the abs itself to chill below freezing if not protected for some time almost every night during that period.
I know insulation can be wrapped around the exposed pipe but I don’t know how much insulation might be necessary to prevent the abs from chilling to freezing nor if the same insulation will prevent the pipe from getting warm enough during the colder winter days to be ready for the next night.
Is pipe wrap insulation around the pipe likely to be sufficient?
If so, how thick?
If not, what might be?
