What is a main house trap?

If you live in a home constructed before 1989, chances are high that your main line was installed with a device known as a “house trap.” These obsolete drain components may cause recurring plumbing problems and even unsafe conditions in your home!

What does a house trap do?

House traps were originally designed to prevent sewer odors from escaping your drains and re-entering your home. A typical house trap (also known as a “p-trap”) looks like a “U” in your plumbing line. Essentially, water gets caught in the curved pipe and blocks gasses from drifting back through the system.

What is a building house trap?

A house trap, also referred to as a building trap or sewer trap, is a plumbing feature that was fairly standard in older homes but is generally considered outdated now. The house trap is a curved pipe of the sewer line that holds a small amount of water at all times.


Where is your house trap?

So what is it? A trap is a U shaped pipe located under sinks, tubs, shower, washing machines, and pretty much anything that connects to your sewer line system. They can be seen quite easily, just open up the cabinet under the sink in the kitchen or look at the side of the toilet.

Are house traps bad?

Problems caused by house traps

In theory, the house trap sounds like a good idea. In reality, however, they have proven to cause serious plumbing issues. In addition to poor design, old house traps were made of metal and have rusted over the decades.


House Trap: How A Sewer Trap Functions In Your Home or Property



How do you unclog a main drain?

Your step-by-step guide: How to clear a main sewer line clog
  1. Loosen the cap on the drain pipe. ...
  2. Allow any sewer buildup to come out of the drain. ...
  3. Gently feed the auger cable into the main line drain. ...
  4. Run the auger until the clog is broken up. ...
  5. Hose out leftover debris. ...
  6. Pull the auger cable back out of the main line drain.


How do you clear a sewer trap?

Steps For How to Clear A Main Sewer Line Clog
  1. Loosen the Drain Pipe Cap (Cleanout Pipe) The first step is to find your main drain cleanout location. ...
  2. Remove Cap, Allow Build-Up to Drain. Once you remove the cleanout cap, step away quickly. ...
  3. Insert the Snake into Pipe. ...
  4. Run the Tool Until Clog Is Gone. ...
  5. Clean Up.


What is a running trap?

running trap. A depressed U-shaped section of pipe in a drain; allows the free passage of fluid, but always remains full, whatever the state of the pipe, so that it forms a seal against the passage of gases.

How does a sewer trap work?

The trap uses a water seal to prevent air from the public sewer entering the property. In the days before individual plumbing fittings were separately trapped, the smell from the public sewer could permeate the house. Waste flows from the house through a U-bend in the trap.


What could cause a sewer smell in my house?

If you are detecting foul sewer odors inside the house, this means that there is a weak link somewhere in your plumbing system. Possible sources include bathroom sink drains, toilets, kitchen drains, basement drains, old cast iron piping, or even the vent stack that goes out through your roof.

How do I know if my main drain is clogged?

Early warning signs of the drain being clogged are hearing bubbling or gurgling sounds coming from one or more of your drains. Or your toilet water or faucets may bubble, and waste water may back up into your tub or shower drain when you flush.

Why does my main line keep clogging?

Grease, fats, and oil are all some of the biggest culprits when it comes to clogging lines. It's NEVER a good idea to pour grease, oil, or other fats down a drain. Always pour hot grease into a coffee can or jar. Once it solidifies, you can throw it away.

How do you unclog a main drain without a snake?

All you need to do is take a cupful of baking soda and pour it down the drain. Consequently, pour a cupful of white vinegar down the same drain. Thereafter, wait for around 10-15 minutes for the baking soda and vinegar solution to break up and clear the clog.


Can I see the drainage plans for my house?

To find the drains on your property, consult with your local council to search for the drainage plans for your property based on the age of your property. A CCTV drain survey can also map and record the drainage system on your property if you are unable to find property deeds.

What is a main drain pipe?

Main drains are located in the walls and floors of your home, while sewer line drains are located outside underground. Each drain pipe in your home is connected to a different household fixture on one end, including toilets, sinks and bathtubs, and the other end is connected to the main sewer line.

What does my sewer cleanout look like?

A sewer cleanout is generally, but not always located outside a bathroom. You'll recognize it as a black or white, three- to four-inch capped pipe. Since cleanouts aren't needed often, yours may be covered by bushes, underbrush or grass.

How do you open a sewer trap?

Driving a screwdriver at an angle into the outer edge of the cap. Then tapping it with a hammer to pry it open little by little. Directly tapping the fitting on top of the cap with small sledgehammer to get a little bit of movement. Again, if you accidentally break the cap, they are cheap to replace.


Are running traps allowed?

Full “S” traps, bell traps, drum traps, crown-vented traps, and running traps are prohibited.

Can a sewer line unclog itself?

2. Call a Plumber. It's technically possible to clear out some small sewer line clogs yourself, but this is rarely advisable. The problem with DIY repair is that the majority of sewer line clogs are caused by broken pipes, tree roots and other issues deep within your plumbing system.