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Usually vents for various appliances or process areas; sewage, kitchen range hood, bathroom vent fan, gas hot water heater or furnace, etc.

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Q: What are those pipes sticking out of the roof tops of homes?
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Related questions

What is arachibutyrophobia?

Arachibutyrophobia is a fear of peanut butter sticking to the roof of one's mouth.


What phobia is the fear of peanut butter sticking to the roof of your mouth?

Arachibutyrophobia is the phobia related to the fear of peanut butter sticking to the roof of your mouth


What is it called of being afraid of sticking peanut butter on top of your mouth?

eat a lot of peanut butter and it will be just fine silly goose PS i like your socks


What is lag pipes?

Insulating material wrapped around pipes, boilers, etc., or laid in a roof loft, to prevent loss of heat


Simple homes with a cone shaped roof?

Yurt


What do belgian homes all have in common?

a roof on the top


What kind of homes do most people live in?

concrete blocs homes with ceramic tiles on roof


What temperature does indoor plumbing freeze?

Assuming you don't mean water heating systems, and just mean normal fresh (drinking) water systems, then they freeze at 0 degrees Centigrade like all water. But in the case of for example a home, the plumbing protected from freezing in a few different ways. Firstly most homes that are lived in have some form of heating, so this keeps the ambient temperature of the water in the pipes above freezing. Pipes that are in places more likely to be exposed to freezing, such as lofts, and roof cavities will be insulated with pipe lagging to protect them from freezing. Plus remember those pipes in roof cavities will benefit from heat rising from the home/building, helping to keep those pipes above freezing. If the subject of your question is in relation to 'burst' pipes caused by frozen water in the pipes expanding and literally tearing the pipes apart, then this will start to happen at about 20 Degrees Fahrenheit or -6 degrees Centigrade. Remember that a little freezing is not a major problem, as plumbers sometimes use special freezing kits, that will freeze a short section of pipe to block it off temporarily, while they work on the pipes.


How do you use roof heat tapes?

You DON'T you use 4" pipes to prevent hoarfrost


does the government give roof grants for mobile homes?

does the government give grants for roofs on mobile homes


What are long term effects on blizzards?

Freezing of pipes, flooding, roof damage, and the blockage of power


What is the phobia of ceilings not being stable?

Arachibutyrophobia is the fear of peanut butter sticking to the roof of your mouth. Is that what you meant?