How do you clear a clogged roof vent?

Asked By: Auxiliadora | Last Updated: 12th January, 2020
Category: home and garden home appliances
4.8/5 (207 Views . 37 Votes)
How to Clean and Clear Your Vent
  1. Climb onto your roof.
  2. Have an assistant flush a toilet while you hold your hand over the vent.
  3. Use a plumber's snake of electricians fish tape to unclog the stoppage.
  4. If you can't entirely remove the clog with your “snake,” use a garden hose to flush out remaining debris.

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Then, how do you unclog a roof vent pipe?

If you can see but can't reach, run a plumber's snake down the vent pipe. To continue, feed the end of a garden hose down the vent and have someone on the ground turn on the water. Listen carefully for water backing up and a sudden whoosh as the weight of the water pushes the clog back down the drain.

Secondly, what happens if vent pipe is clogged? When the vents in your plumbing drain system are clogged, the flow of water can slow down or stop altogether. On the other hand, partial blockages can cause the pipes to gurgle in the same way as a bottle full of water does when you pour the contents quickly. That gurgling sound should alert you to vent problems.

Also Know, how do I know if my plumbing vent is clogged?

The top three signs your plumbing vent is clogged include:

  1. Sputtering, gurgling toilets. When airflow is inadequate in a vent because of size or blockage, the plumbing pressure will be greater than the air in the bathroom.
  2. Slow drain.
  3. Strong sewer gas odor.

How do you clear a blocked septic tank?

Ways to unclog a main drain or full septic tank:

  1. Use a snake or water jetting to unclog the main drain pipe.
  2. Check the inlet and the outlet of the septic tank for any blockage due to solid wastes, scum and so on.
  3. Check the distribution box located between the septic tank and the percolators.

36 Related Question Answers Found

Does a vent pipe have to go through the roof?

You can pass the vent through a wall instead of through the roof, but it must still rise over the roof.

How much does it cost to unclog a vent pipe?

While price varies depending on the market and the severity of the clog, Young from Legacy Plumbing says the average cost to clear a tub, kitchen or bathroom drain runs $109 to $214. Removing a clog from a laundry drain costs between $151 to $214, and remedying a toilet clog ranges from $109 to $273.

How do you unclog a vent pipe without a roof?

How to Clear a Plumbing Vent Without Getting on a Roof
  1. Look up on the roof, from the ground below, and locate the vent pipe's position.
  2. Climb into the attic, and locate the vent pipe, as it passes through the attic.
  3. Cut out a section of the vent pipe, using a hacksaw.
  4. Insert the end of an auger cable into the pipe.

How do you snake a plumbing roof vent?

Bring a 20-foot sewer auger onto the roof. Insert the head into the vent opening and feed it down until you encounter resistance. Crank the handle to work the head through the obstruction. When you are successful in removing it, there should be no more overflow or high water levels in drains or toilets.

Can you put drain cleaner down a vent pipe?


There should be no problem with pouring the cleaner down the vent, however I don't think this will cure the odor problem. Persistent smells from sinks are usually caused because the trap is not retaining water correctly which allows smell from the sewage pipes to rise.

What does a vent pipe look like?

The vent pipe in your attic will be a significant diameter pipe that looks like a toilet drain pipe. Usually, any vent pipe that ends on the roof and isn't a chimney is a plumbing vent pipe. To be sure, or put your ear up against the vent pipe and listen for the sound of water and waste rushing through the pipes.

Can a vent pipe have an elbow?

Use wide-radius elbows for drains to keep the flow of water at a consistent speed. Note: You may have vent piping, but you still cannot use the tight 90-degree elbow -- sometimes called a "vent elbow" -- if the joint is below the water level, which is usually at the level of the sink.

Can I pour water down my vent pipe?

For those items you can't remove from above, run the plumber's snake down the vent pipe. Feed the end of a garden hose down the vent pipe and have someone on the ground turn on the water. Listen carefully for water backing up and a sudden whoosh when the weight of the water forces the clog into and down the drain.

Should plumbing vents be covered?

Plumbing vents protect plumbing traps. They don't make fixtures drain faster; in fact, they do the opposite. All residential plumbing fixtures need to be protected by a plumbing vent. Vents are frequently connected together inside the attic, which allows for fewer penetrations in the roof.

What is Ghost Flushing?


Ghost flushing happens when water leaks out of the toilet tank over a long period of time. Usually this leak is caused by a deteriorated flapper, which is slowly allowing the water in the tank to leak into the bowl.

Why does my bathroom smell like rotten eggs?

The “rotten eggsmell is from a gas – hydrogen sulfide. This gas is created when bacteria grows in drains, in the ground, or in sewage. In some cases, the smell is associated with contaminated water. In other homes, the sulfur smell in your bathroom is from bacteria growth within the water heater.

Can a clogged vent cause a toilet to overflow?

It may be that the vent pipe is clogged. A vent pipe moves external into the plumbing system to replace the air that is pumped out with each flush. When it is blocked, the toilet can't flush properly, which can lead to overflowing. In both of those situations, the toilet bowl will overflow.

Why is my sink drain gurgling?

Sink gurgling might happen because food debris from the disposal has gotten down into the piping and created a partial clog, trapping air. When water washes into the sink, air gets released and bubbles up through the water, producing the gurgling noise.

How do you clear a main line block?

How to clean out a main sewer line clog
  1. Step 1: Loosen the cap on the drain pipe.
  2. Step 2: Open the cap and let the buildup drain out.
  3. Step 3: Feed the auger cable into the drain pipe.
  4. Step 4: Run the auger until the clog is clear—and beyond.
  5. Step 5: Hose down the pipe and auger cable.
  6. Step 6: Slowly pull the auger back out of the pipe.

Why does my stink pipe smell?


A Rotten Egg Smell in the Home
When sewer waste can't escape via the roof vent, it collects in your pipes and settles. Hydrogen sulfide—the gas produced by rotting sewage—begins to flow back into your pipes and your home. You don't need a special detector to sense this colorless gas; you'll definitely smell it.

How do you unclog a roof drain pipe?

Unclog The Roof Drain Using Water Hose
  1. Unscrew the cap and feed the hose into the drain.
  2. Turn on the water and make it flow inside the drain, at a very high speed.
  3. This pressure will push the clog out through the outlet pipe.

What is a wet vent?

Wet venting is a plumbing term and is a method of protecting the trap on a drain pipe on multiple plumbing fixtures. It is a useful method of venting and can save pipe and fittings, time and money. Wet Vent Definition: A waste pipe that also serves as a vent pipe.