I need to reconnect all the under sink plumbing for the double kitchen sink. On the right side is the garbage disposer and I have a Waste King 8000 disposer.

My first question is, it seems the only thing holding up this pretty heavy disposer unit are two rubber "nipples" staying inside the metal slots on the mounting ring. That doesn't look very sturdy at all. Anyone installed a Waste King with what they called an "EZ Mount"? Just those two rubber nipples holding up the entire unit and making the watertight seal?



Second, what is the best way to tie the two sink drains together given my situation?



I was going to put a slip joint elbow at the bottom of the disposer outlet elbow, then run a horizontal pipe to the left, then I will have an end outlet tee there. But looking at it I don't quite like the two 90 elbows coming out of the disposer.



Is there any reason I cannot get rid of the 90 elbow that comes with the disposer, and directly mount a flanged sink tailpiece to it coming out horizontally to the left? Or is that a no no?





Edited 2 times.

voice is 'shrill'

instructions are perfect


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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

straight flanged tailpiece is better way to go.
i always buy the double ended variety so after cutting to length i have a shorter one left.

The waste will flow better if you do not go straight but utilize the elbow that comes with the disposal Your waste needs to be lowered a couple of inches so it can be installed correctly. Going straight you have a 50/50 chance of going up into the sink.

not with a disposal tee (end waste baffled tee)




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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

I do not understand how it can "flow better" by going through two seemingly redundant elbows. Plus two more slip joints.

I got it all connected.





The only thing is the bottom of the outlet tee is only about 3/8" inserted into the U bend. Normally I would cut it so it can go in as deep as possible.



Is this OK or should I cut another piece in between?

use an extension piece




cut to almost 'bottom out' in trap inlet

cut disposal tee to almost 'bottom out' in extension


ps. maximum insertion is always a good thing

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

I wonder if they make an end outlet tee with an extra long tail that I can cut short to fit? I hate to insert another joint unless I have to.

why not just put a 1/2 inch longer tailpiece from the strainer to the tee?
i will lower the tee by that much and give the discharge from the disposer more slope.

Packy, I could do that, but if you look at that tee, that also has a very shallow insertion from the horizontal lines from the disposer. If I drop that tee down, wouldn't it put strain on that connection or the one on the disposer? I am not so worried about the disposer end as that has a metal clamp and two SS bolts holding it, but these tubular skip joints I worry because people tend to put everything in the cabinet, pushing trash cans in, large bottles of detergent and bleach to force the cabinet doors closed pushing loose the connections.

not really any strain to worry about.
one some real hot water is run thru that tubular stuff, it will flex enough and remain happily in that position forever.
as for tenants forcing their belongings into the cabinet and causing leaks, the only way to stop this is to hard pipe the connections.

Also on your Rental Agreement you might add a clause that informs the tenant that any plumbing problems/costs created by storing stuff under the sink cabinet will be paid by the tenant. Suggest to them that they store stuff in another location....I know, good luck with that!

Your pucture is exactly how I would have done it with an end outlet twin waste. Rather than leave that outlet only 3/8" into the trap, I would cut that outlet tee back and install a compression tailpiece as was suggested. There is less risk of that leaking than that 3/8" joint coming loose from vibration.

You cant drop the tee down without putting a lot of strain on the disposal connection.

i would not worry about the disposer connection unless it was coming out at a pretty good angle. there is a thick flat rubber washer inside that clamped connection that should ( i emphasize should) make up for a slight alignment correction.

"Also on your Rental Agreement you might add a clause that informs the tenant that any plumbing problems/costs created by storing stuff under the sink cabinet will be paid by the tenant. Suggest to them that they store stuff in another location....I know, good luck with that!"

I have everything under the sun covered in my lease agreements. However many renters do not care. There was this tenant who had a kitchen drain clog and when I went there to unblock the drain I asked her what she put down the drain, she said nothing just water because she knew better to put anything down there. I started to undo the p-trap, put a bucket under it, then I asked her if she put any Draino type products down the drain, she said of course not because the lease agreement prohibits it. Nevertheless I went back to my car and took out a pair of disposable gloves anyway, and on my way back to the kitchen I threw away the disposable glove bag into her kitchen trash can, and right inside the trash can, is an empty bottle of Draino. After I unblocked the drain I showed her the corn husks and artichoke hearts I pulled out from the p-trap. She acted surprised like "what are these and how did these get there?" Things like this happen ALL THE TIME.