Heating Ventilating and Air Conditioning
Plumbing
Waste and Recycling

What is the proper way to run a drain for a triple bowl sink with a disposal in the middle?

171819

Top Answer
User Avatar
Wiki User
2011-09-15 10:00:07
2011-09-15 10:00:07

A lot depends on the local plumbing code. There is a national code as well as your local state code. If this is a commerical application I believe that each basin has to have its own trap.

answerThe "National Plumbing Code" is a MODEL code with a great name that has fooled a lot of people. (Kind of like Paris Hilton). Whether your state or municipality has adopted a code or not, this suggestion will work and pass about anywhere: On the inch-and-a-half pipe or nipple protruding from the wall install a "wye" with the branch aimed toward the far bowl, run the branch over to the p-trap on the tailpiece coming down from the strainer. Done on that side. On the straight run through the barrel of the wye, head toward the bowl on the near side. Get a "disposal kit" from the BIG BOX selling all the imported stuff. That's a straight piece of inch-and-a-half tubular with a flange on one end, and a "tee" with an internal baffle. Install the baffle tee on the vertical line between the p-trap and strainer on that second bowl, pointing it straight at the disposal outlet. The flanged piece runs from the disposal outlet to the branch of the baffle tee.
1
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0

Related Questions

User Avatar

The disposal has to be in place so that the drain on the dishwasher is connected. If you do not have a disposal or are removing it, there is a extension tube for the drain that has the dishwasher tube in it. The disposal does not have to work for the dishwasher to drain. The water is run through the disposal so that any food particles get ground before going in the drain. After a while, the disposal will begin to smell if it is not run.

User Avatar

Same as you would for a double sink. There is a short tail piece with the disposal that attaches with a flat plate and a short bolt. Install the disposal on the sink and route the drain as needed. There has to be a trap between the disposal and the drain.

User Avatar

If the sink/sink drain fitting connection, sink drain fitting/disposal connection, dishwasher/disposal connection, disposal/drain elbow connection are what are leaking they can either be tightened or have gaskets replaced or other sealing methods used. If the disposal is leaking elsewhere the disposal needs replacement.

User Avatar

The sink drain is blocked somewhere after the disposal. take apart and clean or renew sink drain.

User Avatar

As long as the drain basket for the disposal will fit the drain hole in the sink, there shouldn't be a problem

User Avatar

If you have a septic tank or gray water system in your home then do not install a garbage disposal because it has been know to clog up your drain field. If you have city sewer and have a garbage disposal then I would recommend that when using the garbage disposal, you make sure you are running cold water because it helps make vegi's not stick to the sides of your drain and its cheaper and I forget but something to do with spaghetti and disposals don't mix.

User Avatar

If it is a double sink, does the other side drain? Are you trying to fix the disposal because it does not come on or because it comes on but does not drain. If it comes on but does not drain and the other side does, it is probably just clogged with food. They make drain cleaners for disposals. If neither side drains, put the stopper in the disposal side, hold down on it and plunge the other side.

User Avatar

If it goes into a garbage disposal, the disposal needs cleaning. If it goes into a tube in the sink drain, check that for plugs. Is the drain hose open all the way, no kinks?

User Avatar

So that any food that is in the dishwasher will be ground before getting to the drain, less chance of build up in the drain and to help keep the disposal cleaned out. Also it means you don't have to install a separate connection for the drain.

User Avatar

Water doesn't run up hill. There will be 2 inches of water in the sink at all times. Cut out the wall, install a new T and either remove the old one or cap it off.

User Avatar

Garbage disposal, if one is installed, or a wye branch fitting on the tail piece of sink drain. Dishwasher drain line should have an air break or air gap before the disposal or wye branch fitting.

User Avatar

Yes, through the dishwasher drain attachment on the disposal. There is a knockout on the inside of the hole on dishwasher attachment that has to be knocked out before attaching the dishwaser hose to the unit.

User Avatar

BUILDING of drain-ages burning in incinerators

User Avatar

Most Garbage Disposals have a dishwasher inlet on the side that the Dishwasher's drain hose can connect to. This way only the disposal needs to be connected to the drain. Just be sure to knock out the plug on the disposal's dishwasher drain inlet before connecting with a hose clamp.

User Avatar

A disposal creates centrifugal force and acts as a pump. Often a blocked or partially blocked sink drain can result in slow drains and a disposal will force water through. If it really is the disposal, try slowly adding coffee grounds and/or fibrous material like broccoli centers or pineapple centers while cold water and the disposal are running. If that doesn't solve the problem, have the drain cleaned and make certain that the drain vent works.

User Avatar

Dishes, dishwasher, drain, disposal, dish soap

User Avatar

The disposal is clogged or that side of the sink is.

User Avatar

If you used disposal tap for dishwasher drain there is a knock-out inside the tap that must be removed.Take a large screw driver and hammer and remove knock-out.

User Avatar

Part of the drain pipe is clogged. Take it apart and clear it, otherwise it will only get worse.

User Avatar

your kitchen drain and floor drain are on same line, and needs to be snaked

User Avatar

the drain line is completely or partially blocked, the drain line needs to be snaked out. the disposal is forcing what water it can down into the pipes but if there is an obstruction the water has no place to go but back into the sink.

User Avatar

To change the oil in a car or truck you first drain the old or used oil. Then run a flush and add the new oil. The biggest part of doing an oil change at home is proper disposal of the oil.

User Avatar

Your kitchen sink should already be vented if there is a p-trap draining to the wall. if it is an s-trap it is not vented and not to present code requirements. The dishwasher drain goes into the side of the disposal and the disposal should drain to the trap. A separate vent is not required for the disposal or dishwasher as the trap for the sink is what requires a vent.


Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.