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Vent pipe on roof frozen.
Inside diameter black new construction or reroof thermoplastic vent pipe roof flashing model pb 312 4bk 19 97 19 97.
Look also for short plumbing vent stacks above the roof line they can be covered and blocked by snow.
Typically the short smaller diameter vent pipes less than 4 inches can freeze shut.
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The sewer skewer prevents house roof top sewer vents defrost from freezing during winter months.
As you know the plumbing vent on the roof is needed to supply air to the plumbing system so the use of one plumbing fixture does not pull air from other plumbing traps inside the house and possibly suck them dry.
The diameter of the vent pipe varies from 1 1 2 to 6 inches.
If it s a plumbing vent diameter problem in a freezing climate you ll see the vent basically blocked by frost above the roof line.
Vacuum is the culprit the weather had been cold and moisture vapor escaping from the house system up the plumbing vent began to freeze when it came into contact with the cold metal of the plumbing vent on the roof.
Your home s plumbing system is designed to efficiently remove water and waste.
Patented easy to install vent sized to fit all standard pipes.
Why plumbing air vents are important.
The vent stack is the pipe leading to the main roof vent.
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You will have the best success if you remove the melting water with a shop vac.
You can bring a small heater up on the roof and direct the heat into it may help.
Its drainage and vent functions are actually two systems.
If you live in a cold weather environment your sanitary waste system s roof vent line probably freezes in the winter.
Sewer pipe solution to clear frozen sewer vents and dangerous gases in your home.
As warm moisture laden air rises through the vent the cold outside temperature causes it to condense and freeze on the vent line eventually plugging it.
Sewer vent pipes on the north side of the roof also may be more prone to frost plugging than those on the south side of the roof.