Florida/General Pluming Code for Kitchen Sink Piping

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  #1  
Old 09-04-13, 10:09 PM
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Florida/General Pluming Code for Kitchen Sink Piping

Hi All,

I am in the process of doing a kitchen renovation, and I would like to re-locate my sink probably about 15-30 inches over. Currently the sink pipes are in the original plaster/cement and contractors are telling me it would cost significant amount of money for them to jack up the cement move the pipes and patch it all up.

My question is, why can't they shorten the pipe and put an extension pipe across to the area that I would like the sink to be moved to for hookup. I would cut a hole on the side of my base cabinet to allow the pipe to run through that. I am told by a contractor that is against code (but I want to make sure, as he might just say it to make more money off of me).

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Old 09-11-13, 06:31 AM
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I don't see any reason you can't do what you're talking about. You'll lose a bit of cabinet space, but you obviously understand that. It looks like even with those deep sinks you have now, you have a bit of vertical space to add the code-required 1/4" drop per foot. The one issue you may run into is increased distance from the vent.

What is below this space? I assume there is a window above the sink? Can you take a picture of the whole area? Also, how old is the house and existing plumbing in the wall?
 
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Old 09-11-13, 06:50 AM
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additionally you cannot have two traps. Must be one trap with a center or side waste...
 
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Old 09-11-13, 08:44 PM
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Good catch Mike, not sure how I missed that!
 
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Old 09-12-13, 12:45 AM
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Got a code reference for that, Mike? You cannot have two traps in series but this is two traps in parallel from two different sources into a single sanitary tee.
 
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Old 09-12-13, 10:44 AM
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Thanks for your thoughts so far, I have some better pictures now of the whole space. I will need to move the sink 30-40" to the left. Right next to the sink will be a dishwasher, so I am concerned about any piping sticking out from the wall, blocking the dishwasher from being flush.

What do you think a job like this would cost through a plumber and what would the job ential?

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Old 09-12-13, 11:13 AM
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Got a code reference for that, Mike?

From the ICC... But there is an excepton and that is a combination fitting or a double fixture fitting. That what the OP has is just a Y and does not apply. Double fixture fittings were discussed many times here regarding hook up of dual vanity's....

1002.1 Fixture traps.

Each plumbing fixture shall be separately trapped by a water-seal trap, except as otherwise permitted by this code. The vertical distance from the fixture outlet to the trap weir shall not exceed 24 inches (610 mm) and the horizontal distance shall not exceed 30 inches (610 mm) measured from the centerline of the fixture outlet to the centerline of the inlet of the trap. The height of a clothes washer standpipe above a trap shall conform to Section 802.4. A fixture shall not be double trapped.

Exceptions:

1. This section shall not apply to fixtures with integral traps.

2. A combination plumbing fixture is permitted to be installed on one trap, provided that one compartment is not more than 6 inches (152 mm) deeper than the other compartment and the waste outlets are not more than 30 inches (762 mm) apart.

3. A grease trap intended to serve as a fixture trap in accordance with the manufacturer’s installation instructions shall be permitted to serve as the trap for a single fixture or a combination sink of not more than three compartments where the vertical distance from the fixture outlet to the inlet of the interceptor does not exceed 30 inches (762 mm) and the developed length of the waste pipe from the most upstream fixture outlet to the inlet of the interceptor does not exceed 60 inches (1524 mm).
 
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Old 09-12-13, 11:43 AM
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My new sink will be a single sink with 1 drain that is 32" wide. The cabinet will be 36".
 
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Old 09-12-13, 12:00 PM
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Thanks, Mike. The line you printed in red states just what I did, traps in series are not allowed.
 
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Old 09-12-13, 12:08 PM
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So, besides the debate about my existing setup, can someone give me guidance for what I'm trying to do? I would like to move the sink (which will be a new single sink 32" in a 36" cabinet) over about 30-40" with the disposal. Where the sink is now is going to be a dishwasher. will they have to break up the plaster/cement to move everything? What would have to be done and for a typical plumber what is the cost of something like this?
 
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Old 09-12-13, 12:08 PM
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Yes what happens with the two traps like that is when you use one sink it will most likely suck water out from the other trap. Then sewer gas will release in the home.

The only way to use two traps is using this fitting in the wall where there is a common vent.

 
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