Leak in kitchen sewer line causes big stink

Home repair and maintenance can sometimes be a rough and time-consuming ride. Here’s an example.

Recently, we noticed a smell near the back door. Most all of us have, at one time or another, had to deal with a funny smell. How to track its source?

The first thing that comes to mind is a dead rodent stuck in the walls, floor or attic.

Just in case, we decided to pull out the refrigerator and see what lay behind it – possibly a mouse? That would have made the problem easier to solve. But there was just a lot of lint, grease and dirt. Naturally, we used the opportunity to scrub the fridge and the normally hidden floor and walls. Looking back, it was a good thing we did this: Cleaning the cooling tubes on the back of the refrigerator help to make it operate with better energy efficiency.

Next, maybe the closet, we thought. So the closet also got a complete scrubbing and organizational overhaul, another good thing accomplished – but still no mouse.

We were puzzled, to say the least. Not behind the fridge, not in the closet. How do those little suckers get into the walls, and why is it that they smell so strong when they die?

Maybe it wasn’t in the wall. Maybe one of the sinks or plumbing fixtures that we rarely use has a dried-out drain trap – you know, the P-trap, that squiggly little thing in the drain system below all the sinks in your home.

Every plumbing fixture has a trap. It’s what keeps sewer gases from backing up into the home. If a fixture isn’t used for a long time, the water in the trap can evaporate and sewer gases escape into the home.

This still wasn’t the answer.

Next, we decided it was the disposal. Grease and food trapped inside can really stink. After running a tray of ice cubes and an entire lemon rind (cut in half and juiced), the rotten smell persisted.

Then, we figured it had to be that a nail had been driven through a sewer vent in the wall. We haven’t hung new pictures lately, but we installed a window outside the kitchen sink. That had to be it. We must have driven a nail through the sewer vent pipe when we were replacing the window or trim.

But that was not the case.

Days passed and the smell got stronger; strong enough to cause a gag reflex, in fact. We decided it must be coming from beneath the house. So, under the house we went.

And there it was: a little lake science experiment. As terrible as it smelled, the ultimate discovery was a joyous event. We’d finally discovered the problem and could deal with it.

The sewer line beneath the kitchen sink had cracked (we think from disposal vibration), and there was a small lake of sewage in the crawl space. We had to remove flooring to reach the area from above.

Here’s what we did to solve the problem: