Drain waste vent system

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3
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4answers
51k views

What causes tub drain to gurgle when toilet flushed?

Recently, the drain in my second floor tub makes a gurgling sound when I flush the toilet, which is located right next to the tub. They are obviously on the same drain line. I know that there is a ...
14
votes
3answers
16k views

How do I replace this cast iron toilet flange?

I have a big old gawd awful cast iron (at least I think it's cast iron, the house was built in 1940) toilet flange that is in sorry shape. See? There will never be a better time to replace it - as ...
4
votes
3answers
81k views

What could cause bubbling toilet when the shower or sink is running?

One of the two toilets in my rental house is bubbling when the shower or sink in that master bath area are on. In the past, about 6 months ago, I have had plumbers and rotoruter out and they could ...
3
votes
3answers
10k views

Decipher my bathroom rough in

Can someone help me decipher this picture? When I had the house built, the builder roughed in a bathroom for later use. The pipes in this picture are A 2" pipe, possible a vent with a T connector ...
2
votes
1answer
3k views

Why is my toilet bubbling?

Last night while my washing machine and sink in the master bath was running, my master toilet started having air bubbles come up. Then this morning while I was showering I heard bubbles again, and ...
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vote
1answer
5k views

How long can a sink drain be?

I've read that the rule is 1/4" per foot of drain line. From what I know, the rule is based on the height of the P-trap to where you tie in. What part of the P-trap do you measure from? How low can ...
12
votes
8answers
41k views

What can I do about my drains constantly getting blocked?

The one thing I have tried to do about this is use those foaming and non-foaming drain unblockers regularly. That has just been money down the drain, pardon the pun. I suspect that unblockers only ...
3
votes
4answers
890 views

Toilet gurgling when another one is flushing: 6-way joint

I have 2 adjacent bathrooms, with toilets opposite of each other. I recently upgraded one older toiled that took a minute to flush with 3.5 gallons of water to 1.2 GPF model with "aquapiston" ...
11
votes
4answers
18k views

Do I need a vent for extending a drain to a new bathroom addition?

I am building a new full bathroom on what used to be my back porch. I am planning to extend the existing drain at a cleanout and to run it outside the house underneath the floor. I need to know if I ...
7
votes
4answers
37k views

Why are there bubbles in my bathroom toilet and sink?

I have had a lot of really odd things happen in my bathroom this weekend and I want to make sure it is nothing too serious. Ok so when I was taking a shower I heard the toilet bubble up. A few ...
6
votes
3answers
5k views

What could cause my sink to drain slowly?

Sometimes our bathroom sink will drain so slowly (with the water running) that the water will fill it faster than it can drain. However, after shutting the water off and letting it completely ...
5
votes
1answer
2k views

Should second trap under kitchen sink S-trap be there?

My kitchen sink drains through an S-trap immediately below the sink to another trap (a P? a U?) in the basement below. The drain pipe then runs along the wall till it meets the main drain pipe shortly ...
4
votes
2answers
90 views

Repairing leaking DWV vertical 3" thin wall PVC

While painting, my wife discovered some mold on top of the baseboards, and being curious I investigated. What I found pulling the baseboards is they were covered in black mold on the backside, as well ...
3
votes
1answer
3k views

What does a vent stack look like?

Excuse my noob question, but what does a vent stack look like? It's pretty easy to tell which pipes are for waste (I can hear the water running through them), and I'm assuming that all of the pipes ...
3
votes
1answer
449 views

Can I use the original drain line after I move my washing machine twenty feet away?

I currently have a washing machine and dryer in the basement and wish to move them both upstairs. I can tap into the same drain line, but it will be about 20' from the old p-trap. Should I install a ...
2
votes
2answers
751 views

Covering / Cap over DWV vent pipe

I've eliminated a DWV vent pipe during a bathroom remodel (consolidated fixtures and went from 2 vents to 1) but I don't want to mess with roof patching/repairing if I were to undo the penetration of ...
2
votes
1answer
10k views

Should a kitchen sink S-trap be replaced?

Everything I see mentions P-traps. I seem to have instead an S-trap. What are the downsides of this, and is it something that should be fixed?
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votes
0answers
39 views

Is this a proper way to connect main vent?

I'm researching the way to properly re-plumb my 2 bathrooms, and trying to figure out the best way. Specific question relates to this section of the code (Illinois 890.1450 e): All main vents or ...