I had my basement set up for a bathroom. The plumber neglected to put in a drain pipe for a sink.?

Question

Can I tap into the vent pipe that is for the toilet to drai my sink??

Answer 1

No, but you can cut into the main soil stack, put in a tee with no hub fittings, and vent the sink back to that toilet vent.

Answer 2

Well from what I know the vent is suppose to run all the way out the roof. The smell youhave is probably because the vent is "behind the wall" and not ran out the roof? There is a vent vacume breaker that works on vents not raN all the way out. I'd think it should go into the attic at least but with the vacume breaker that may not be needed. Im not up on all the plumbing codes so ask a few more about this and especially a profissonal in your area. Here is a basic discription of the plumbing drain: Drain strainer is connected to the sink and a piece "tail piece" extends into the trap which holds water to 1 form a seal so sewer gas wont come on into the room where the sink is located. The trap ouitlet is lower than the inlet and continues (usually) into the wall where it connects to the main plumbing drain. A vent then comes in when (normally) the drain continues behind the wall and somewhere goes to the other main drain and eventually out the structure. The vent does several jobs at once. 1 allowes the water comming into the main drain to flow at a steady lower level because the air pressure is equal at the inlet and in the main pipe thanks to the vent. 2 the vent allowes and gas buildup to escape out the piping and structure piping where it is unobjectionable. 3 the vent can be streight out or may turn and pick up other fixtures to vent them out as well as long as it is pitched down hill, in an area that permits repair/service access, and is of addiquate size for the fixtures attached to it. The size is something a pro or someone with a code book can reccomend. Im courrious what the rubber dish is that your hubby pulled out? Could this have been a vacume breaker I mentioned above? You have to realize that a fairly good amount of water has to be running out a drain to acctivate a vacume breaker. To demonstrate the opperaton of a vaumen breaker take a soda straw run water through it then plug the ent w your finger, plug the other end with other finger and hold down hill and take finger off the up hill side. now the water will flow out when ypou remove down hill finger. refill straw and this time insted of removing uphill finger, pinch the straws end to seal the up hill end. Now you see water is in all the line and cant come out until the water allows air in and lets the air push the water out.The lack of air in the drain causes the vacume breaker to open. If you put in the vent to improve drainage and this did not help you may have scale buildup inside the main drain or other stoppage. If this is a vacume breaker put it back together and in. Look for the installation instructions. If it wont go together take it with you to a plumbing supply or plumber and get a replacement. If you try and put it together and it still smells - it may be broken and have to be replaced. Write me back Id like to know if this helped you. Maybe I need some more information to be on the same page with you.

Answer 3

Yes, you could tap into the vent pipe. It is done in many homeowner done rehab projects. You should know it is a code violation but most home inspectors would not find it. You will NOT get any sewer gasses into your sink IF you install the proper P trap to prevent this.
Look under any of your other sinks and you will see a pipe that looks like a P laying on its side.

Answer 4

AND He called himself a plumber? Yes.. you can do it if you have the tools, etc.. Unless money is a factor, I would strongly recommend you get that guy back out and tell him to do it right or if not.. send in a report to the Better Business Bureau on him and perhaps get a plumber who knows how to do plumbing.. Attaching to the toilet drain could be tricky in view that you DO NOT WANT the sewer gases to come back up thru the sink

Answer 5

yes you can tie your lav into the vent it is done all the time and is not a code violation.just make sure the vent ties into another dry vent or goes thru the roof.if you just paid for a future bathroom the plumber did nothing wrong.


registerd master plumber

Answer 6

Did you PAY for a drain from a sink? If so, the plumber owes you an installed drain.

Answer 7

if you do that then you'll get quite a stink coming from your sink. run the rain pipe to the outlet of the shower or bath. rogue tradesmen! always go with recomendation when having building work done

Answer 8

no its made as a vent, run a new pipe to your main drain and you can use the other as a vent also tho

Answer 9

Not an expert but that's quite a thing to "forget". I would follow up with him and what your agreement was. In any case, I sure wouldn't use him again.