Both kitchen 1 1 2 inches and bathroom 1 1 4 inches are smaller than the rest of the drain system on purpose.
Sewer gas venting into attic.
Pro vent makes such vents.
If the crack is in a drain line you often see an associated water leak.
If you smell sewer gas in your home that means either a trap has run dry or a vent line has cracked.
When vents diminish a building s indoor air pressure.
But vent pipe cracks are far more elusive.
When the blockage has been cleared the water.
If that doesn t get rid of the odor it s time to call a professional.
They lead into larger branch drain pipes which lead into the 4 inch stack.
Cracks in either plumbing drain lines or vents pipes are the other source of sewer gas leaks.
Sewer gas can also leak into your house when plumbing vents are installed too close to a window or air intake.
Insert a sewer auger into the vent and push it down as far as you can if the water overflows.
Especially possible if a front comes through changes the pressures and temperatures.
They can leak vast amounts of sewer gas and you might not be able to locate the source easily without a special machine.
One easy fix that may work is to pour a quart of water down each of your drains.
Sink and shower plumbing vents can end indoors providing there s a trap j trap where water sits and keeps the odor from venting back into the house.
Venting into attic in cold weather you can also add extra moisture to the attic area that could condense on the underside of the roof and cause moisture and possibly mold.
Crank the handle to work the auger through the blockage.
When installing your vents it s highly recommended that you plan out your drain lines to minimize the risk of clogging.
A toilet vent for the sewage stack must vent outside.