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handyguy13

09:35AM | 02/14/06
Member Since: 02/13/06
5 lifetime posts
Bvplumbing
I am remodeling my master bathroom. I have seen similar posts concerning my question but have not gotten an answer clear enough to resolve my issue.

I am converting a single sink vanity into a double. The vent is in the wall to the right of where the vanity will sit. The original sink waste is naturally tapped right into the vent with a T and the drain pipe is an approx 20" run off the vent.

The width of space between the walls where the vanity will be placed is 73.5" so I have plenty of space for two sinks. I can extend the water supply lines with no problems but the second sink I will be adding will be approx 5' from the existing vent. Will I have problems draining the new sink if I just extend the original drain pipe from the first sink? I will have two sep. P-traps, 1 for each sink. Or can I have 1 p-trap in the middle of both sinks? Simular to a kitchen sink.

Also I will be using 1.5" PVC. I have read that if you are using 1.5" you can only be 2'6" away from the vent or if you upgrade to 2" PVC you can extend that to 5'. Is that true? Will that work? Or do I have to add a new vent for the second sink regardless? Is there an easy solution to my ramble?

Thank you in advance,

Sylvan

09:51AM | 02/14/06
Member Since: 01/24/06
1531 lifetime posts
Me_office1
Depending on your location and what the local codes say is what you should go by.

In NYC I can for example install a trap 2 ft from a vent and then another 2 ft from the trap to the fixture so in reality I am 4 ft from the vent pipe. (15 feet for a floor drain)

About increasing the size of the piping I think you maye talking about the FU load and developed lenth.

The developed lenth has nothing to do with the drainage size only the vent size as far as the codes I have read.

Personally I would open the wall and install a double san tee Wye and trap each fixture using the common vent NO wet venting


handyguy13

10:11AM | 02/14/06
Member Since: 02/13/06
5 lifetime posts
Open which wall?? The bathroom is now gutted completely. Mostly all studs except wall in front and to the left of where the vanity is going to be placed.

The wall in front is an outside wall and only has 2 x 4 studs and can not put the new vent through that. It will compramise the strenght of the wall.. No attic access over head it this section of the house either.

What is a no wet vent???


Sylvan

10:20AM | 02/14/06
Member Since: 01/24/06
1531 lifetime posts
Me_office1
Wet vent is where some folks think nothing of using a drain line and also using it for a vent

If you cannot install a fitting like a CROSS that allows for the vent on top either side for waste and the bottom for the combined waste you may be able to use one trap centrally located and use a slip joint tee with waste bends or double offsets connecting to a common trap.

If you know what a tapped tee looks like picture it double like one would use in a back to back situation but in this case side to side

handyguy13

03:48AM | 02/15/06
Member Since: 02/13/06
5 lifetime posts
I can fit the piping and configure it any way I want. I guess my question is how far can the second additional sink be from the vent without having to add another vent?? I can add a second vent if need be. But I do not want to if I do not have to..

Sylvan

06:04AM | 02/15/06
Member Since: 01/24/06
1531 lifetime posts
Me_office1
Depending on the local code, one should be able to install a trap centrally located as long the distance from each sink outlet if not over 30" to the trap inlet.

!

!

handyguy13

07:16AM | 02/15/06
Member Since: 02/13/06
5 lifetime posts
What is the best way to find out about what my local code is, and what questions should I ask??

Sylvan

07:40AM | 02/15/06
Member Since: 01/24/06
1531 lifetime posts
Me_office1
Call your local building department ask for the plumbing division SAME PLACE one would pull a permit to do construction

Then explain to the inspector what exactly you want to do OR call a local plumbing contractor ask him /her what plumbing code they use in your area go on the computer and look up IPC / UPC or what ever local codes they use.

If this job does require a permit and you do it yourself and later on you go to sell you may get a violation against your C of O

When in doubt ask the local governing agency


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