 | |
| Browse | Ask | Answer | Search | Join/Login | |
Revent or loop vent my kitchen island?
Asked Apr 20, 2010, 11:24 AM
—
14 Answers I am planning a kitchen remodel in which I will move the sink/dishwasher from the wall to an island about 10' from the current 2" stack in the wall. I also have a 2" iron stack running from my second floor showers through my kitchen to the basement (currently enclosed in a column that will run through the new island). I originally thought I could drain/vent the new sink through this 2" stack, but it sounds like I can't because this is a "wet" pipe and cannot also be used as a vent. It seems that I could use the 2" stack inside the column to drain the new sink, but I will then have to run a revent up through the second floor to somewhere above the shower. Or, I could loop vent the new kitchen sink back to its original stack in the kitchen wall. The loop vent seems easier... My question then, is there a maximum distance that I can loop vent from the new island sink to the existing kitchen drain stack? Is 10'-13' to far? Any other recommendations? |
14 Answers
| ||||
| Sounds like you have a good understanding of how plumbing works. Cutting into the 2" sounds fine and then vent as you are suggesting or perhaps you could use a PROVENT. A provent (or AAV) is not legal in all states so check your local codes, but if acceptable this mechanical vent simply screws into the pipe just above the trap..see image. Although not ideal, that would take care of the venting pretty easy. Otherwise, please describe how you plan to get the vent relooped back to the old vent...curious how you plan that as this is an island sink...? I understand the vent going upstairs and connecting in at 6 inches above the flood level of the SINK (not the shower), but how can you revent by looping back? Let me know...OK? Mark | ||||
| |
| ||||
| Quote:
Good luck, Tom | ||||
| |
| ||||
| Thanks massplumber and speedball, I've read your comments on similar posts and appreciate your expertise. To answer your question, massplumber: Quote:
Black & Decker Power Tools However, in another post, Milo (the california plumber) said it violates code because the vent connects below the overflow level of the sink. Is this true? If so, I could try to send the vent up higher into that wall to connect to my current kitchen stack above the overflow level. | ||||
| |
| ||||
| I'll tell yeah, I have a few different ways to do this. One is very much like Tom's (see image) and another is closer to black and deckers' version (click on massislandvent2.pdf, below left). I can present a couple other ways, too...  Since you really seem willing to do this job according to best practices/priciples I would suggest that you find out exactly how they pipe an island sink up in your area. If you cap off the old kitchen sink and use the old stack as a vent stack then it sounds to me like you meet the 6 inches above flood level rim requirement that Milo talked about...as long as nothing above this old vent...right? Anyway, maybe if you tell us what code you fall under we can give better info...maybe? Otherwise, you should be able to find the info. Online via Google Back to you... Mark | ||||
| |
| ||||
| Thanks again Mark. I live in the Saint Louis, MO, area. In my last house, I did quite a bit of "creative" DIY plumbing, but we plan on being in this one for a while, so I'd like to do things right. I adapted your picture to reflect my plans:  This pretty much follows the Black and Decker suggestions. Let me know if you see any problems. Are you saying that even though the vent hits the stack in the basement its OK because nothing else drains above it? I thought maybe I needed to take my foot vent up into the kitchen wall and attach it to the stack above the flood level of the island sink. Alternatively, I thought maybe I could use the 2" shower stack to drain and the old kitchen sink line to vent? Would that change anything? | ||||
| |
| ||||
| Looks good to me, too Tom! Beardz, you don't need to run the vent pipe up inside the wall as the vent is already above the flood level rim of the sink...heck, it goes up to the 2nd floor or higher...right? Think of it in terms of the old sink....the vent just continued up right as it is now...same applies here. If, as an example, you wanted to reconnect the old sink and still install a sink in the island then you would have to open up the wall and take the island sink vent and connect that 6" above the flood level rim of the old sink. Hopefully, that clears that up... Back to you... Mark | ||||
| |
| ||||
| I would just add: do not reduce the vent to 1 1/2" until you get above the floor. Reduce after 2" clean out. Also, in your drawing #7 you don't show clean outs on the loop vent, inside the cabinet. Install one on the drain and other on the vent. Slope below-the-floor vent upwards... Otherwise, looks good...Milo | ||||
| |
Not your question? Ask your question View similar questions
| Thread Tools | Search this Thread |
Add your answer here.
Check out some similar questions!
Making a loop drain without a vent [ 9 Answers ]
How do I loop a drain with out access to a vent line?
Kitchen island with dishwasher [ 1 Answers ]
I own an older home and the countertops are too low to install a dishwasher. I don't want to buy new cupboards so would like to install an island which would include a dishwasher and some type of countertop with bar stools. Is this possible and where could I find such an island?
Kitchen Island Venting [ 4 Answers ]
I have recently installed a kitchen Island and need to know the best way to vent it other than cutting into my walls or running a new vent through the roof. I see ads for "air admittance devices" and also "plumbing check vents" and am wondering about the reliability and safety of such devices. The...
Draining/Venting kitchen island into existing vent pipe [ 3 Answers ]
Hello everyone. I am going through kitchen renovation (bless my heart) and adding a kitchen island. The island will have a small bar sink. My main sink drains into the main drain pipe inside kitchen wall and I will not have access to tap into that. I know mostly how to drain kitchen...
DW Vent or Air Gap loop? [ 1 Answers ]
:confused: Hello - I have a DW that is vented and then runs to just below the double sink opposite the disposal. I want to install a new faucet and would like to make a Looped air gap rather than use the vent on top of the counter. Do I have to loop it through the disposal or could I just go with...
View more Plumbing questions Search
