Kitchen Plumbing Question

[Joeh]

Hey all,

Thought I'd throw this up as a hail marry to see if someone can shed some light on my thoughts.

My wife and I have a wonderful house. We love it dearly, except for the obnoxious sewer smell that emanates from our kitchen sink. I've attempted several fixes on it, and have yet to find a remedy. My fixes include, cleaning traps and pipes, new garbage disposal, new faucet hardware and lines, new shrouds and new seals. Nothing has worked. Some things have temporarily given relief, while others have managed to do nothing.

So, I went to the internet to search for more information. It appears that the configuration on our sink is no longer up to plumbing code. We have, what I have learned, is called a double trap setup. One trap from the drain side of the sink, and one on the garbage disposal side. I've read that in a kitchen environment, where high amounts of water are dumped into the pipes, that this can create suction and remove the water from the traps, thus causing sewer gas to leak back into the house. This would explain the smell we have, but I can only guess that this is the issue at this point.

Here's a picture of the current setup:

If I was going to fix this, how much technical ability would it require? I replaced the garbage disposal...and a quick google search shows that it's mostly just following the steps correctly and getting the right measurements on pipes. Anything I'd need to look out for?

I'm considering going to a single p-trap setup, with both existing traps removed and fed to a single drain line, with a ptrap after that, before the exit out of the cabinets. My understanding is that this is the "correct" way to do it?
Similar to this:

Except that it would have to 90* again to exit to the right where my existing exit line is. I am sure that between 90* connectors, I can make it fit the existing exit line.

Thoughts? Am I totally off base?

Thanks guys!

 

[Wild Weasel]

It's not nessicarilly hard if you do it for a living like me. Just depends how frustrated you want to get and how many trips you like to make to the supply store. You are on the right track tho dump the double ptraps get everything to a single trap you will need to change drain configuration on disposal.

 

[BIG_MIKE2005]

I just did mine last night. We are in the middle of a full kitchen renovation. It was pretty simple. What I did was use a standard 2 basin drain kit/single s-drain trap (or P whatever everyone is callin it, LOL). I ran the dishwasher drain into the garbage disposal & the outlet from the disposal into a "T" which connects both sinks. At the "T" section I installed the trap. Our plumbing is through the floor instead of the wall due to being on a crawl space instead of a slab. Just grab a hack saw & trim slowly, always better to trim little by little than too much & make another run to the store. I'll try to get a pic of mine to put up tomorrow if you want.

 

[BReeves]

Wouldn't be real hard... Put a T in the pipe under the left sink and leave it's trap intact. Put a straight outlet on the disposal and run the pipe over to the T you put in the left drain. Make it so it runs a slight downward angle from the disposal. Cut out the section behind the disposal where the two come together and put in a straight through pipe.

I'm no plummer but have done allot of DIY work and this is the way I would fix it..

 

[tyromeo55]

It's easy

Go to lowes and get a new sink drain kit for double basins and a disposer. It should be like 10 bucks then replace everything. Also. Ya might make sure the roof vent is not obstructed for the kitchen