Garbage disposal kickback

I moved into this 8-year-old house 3 months ago, and have had this problem since the beginning. I've got a 1/3hp Kenmore (rebadged Insinkerator) disposal under my kitchen sink. Maybe half of the time when I'm grinding up waste in the right sink, the left one will spray some chunks out. I don't think that water typically comes up, just some spray at the beginning. I've tested both sides, and they both seem to drain fine (not slow at all). I took this picture to show the plumbing. It looks correct to me. Any ideas on how to eliminate this annoyance?

Thanks!

 

I am guessing the disposal shoots gunk up due to the straight pipe coming from the disposal to the tee. Most disposals come with a fitting to direct waste into a p trap. Yours just shoots it straight to the tee and sometimes it goes down, sometimes up.

If I am correct, then you will have to trap the disposal just like the sink. Which, involves tearing out what you have in there.

IMO, I never will understand why folks want to grind up food and grease, and put it into the drain system. I get blasted a lot for my opinion, but the folks who love disposals, are lucky when they have no clogging issues.

 

Well, when I searched the threads, this picture that shows the correct way to connect a disposal came up several times. This is the way mine is plumbed. It's hard to tell from the angle of my picture, but that pipe coming off the disposal isn't level. There is a slight downward pitch to it.

 

You want pitch, to help drain. It just depends on what area you are in as far as piping goes. My area, we use two traps. And we use drainage fittings, not tees. Good luck!

 

I'm assuming that chrome tee doesn't have a baffle in it, which lets the disposal waste shoot up the pipe, instead of all going down it. Changing that tee to one with an internal baffle may help.

 

Arnie hit it on the head! There are T's with a baffle system that direct the ground gunk downwards. Yours obviously doesn't have that feature (not that I like them myself as they restrict the flow and tend to clog a tad easier). You have 3 options in my opinion - live with it - replace the T with a baffled T - replace the T with one that has a elbow built in that will direct the effluent downwards (my personal preference).

 

Thanks folks for the advice. Can you show me a picture of what I'm looking for? Are these things available in the blue or orange big box stores?

 

thezster, is this what you meant by a tee that "has a elbow built in that will direct the effluent downwards"??? See picture below.

 

Damn!!! It's a tad after 9am.. and the BUD is kickin in

Your photo is exactly what I would install.....

 

The lack of proper venting might also have something to do with your problem....

 

Not based on his initial description, IMHO.... Poor draining overall - sure.... but just a spray of chunks when he turns the disposal on - more than likely a condition of "overspray"... due to the nature of the T fitting.

 

Thats a regular drainage tee. The one he is talking about has a baffle in it, should be chrome or plastic. I cannot download the pic but here is the website...www.hodesco.com item number 56-203

 

Actually, I prefer the drainage T to the one with baffles.... That stinkin baffle restricts flow from the disposal (sure, it directs it away from the other sink but.... ). Rarely do I get a backup into the second sink with the regular fitting - quite often I get a backup into the disposal with the baffled fitting (yeah, I toss a lot of crap into the disposal)....