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TonyD 01-15-2007 10:14 AM

I am remodeling a 2nd floor bathroom and 1st floor kitchen. Let me see if I can explain this correctly and make sense.

2nd floor bathroom the tub, toilet and sink all emptied into a 4" waste line which also when out the roof for venting. the tub also had a vent cut in approx 10" past the trap which vented into a separate 2" pipe going through the roof. I have left all the 4" cast iron and just going to replace the WC and tub drain. Since the tub drains into the 4" waste line which is vented do I have to reinstall that separate 2" vent.

I am rerouting & putting in a new sink in the kitchen, the drain is going to drop into the basement and tie into the main 4" waste line. this 4" line goes all the way out the roof for venting and picks up the 2nd floor fixtures on the way out. Is this a good enough ( safe and according to code) vent for the kit sink.



KUIPORNG 01-15-2007 02:37 PM

I think you need to draw a picture to get answer... it is too much reading to understand the situation...

Ron The Plumber 01-15-2007 06:05 PM

Yes a drawing would be great help.

TonyD 01-15-2007 08:03 PM

I drew a little sketch, not he best drawing. I cannot figure out how to attach it.


TonyD 01-16-2007 10:58 PM

1 Attachment(s)
I hope this makes some sense


Ron The Plumber 01-17-2007 03:25 AM

Where are you tieing the vent in at for that kitchen sink?

TonyD 01-17-2007 01:00 PM

There was a 2" vent which vented the tub, since I have the hole in the roof I was going to replace it...I can tie the Kitchen sink into it. Can I tie it in the basment, it would be below the Ptrap if not I would have to notch alot of studs on the same floor as the sink..


Ron The Plumber 01-17-2007 02:26 PM

Vent can not be below the p-trap, get out the drill and sawsall.

TonyD 01-17-2007 06:14 PM

Ok, If that's what I need to do... what is considered a wet vent. Also with respect to my 2nd floor tub. Is it okay to just run the 2" drain to the 4" waste line which runs vertical from the basment thru the roof.


Ron The Plumber 01-17-2007 06:31 PM

A wet vent is a drain that dumps into someother fixtures vent this using it's vent for the fixtures vent your connecting.

Rules apply to a wet vent.

One pipe size larger then the fixtures requirment. example: Kitchen Sink Wet Venting into a toilet vent, KS requires 2" so to wet vent into a toilets vent, pipe will need to be increased to 2 1/2", since there is no 2 1/2" pipe, pipe will need to be 3"

Your code book will say if your allowed to wet vent or not, here we can.

For the tub yes you can connect to the 4" and if your drain is 2" pipe for the tub you can run up to 5' before vent, if the drain is 1 1/2" then 3'6" before a vent.

Now if your tub will tie onto the 4" vent within said distance then you can use that 4" for it's vent.

Remember this is codes we use, and maynot apply to your area. You have to read your codes, your codes may not be a strict as ours here.

TonyD 01-18-2007 04:11 PM

Thanks Ron, I appreciate your help as always. In the kichen Im using 2" pvc for drain. the should be 1 1/2 " can that be safely notched into load bearing beams. In the bathroom Im installing a whirlpool tub 22" deep. what is a good height for the faucet, knobs and showerhead.



Ron The Plumber 01-18-2007 06:31 PM

You should not notch beams, or drill. Go around them and run the line in the walls if possible.

For valve height, use your best judgement, we do set shower head at 80" off floor, for valve, hold it up there, for spout, we set then 4" off tub edge.

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