Drain waste vent system

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73 views

combo tee vs. tee wye

I saw on wikipedia a mention of "combo tee" and "tee wye" is there a difference or are they the same? I've also heard of something called a "sweep" or "long sweep" is that related here?
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5answers
869 views

Why do I have a vent stack if none of my fixtures are vented?

As far as I can tell, none of my plumbing fixtures are vented. I have a double-sink in the kitchen, but no vent pipe. My washroom (photo here) similarly has an s-trap. Same thing on my washing machine ...
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1answer
29 views

Bathroom sink occassionally backs up into tub

My bathroom sink and tub are directly adjacent. The tub drain appears to connect to the sink drain line. Photos follow. Under normal use, there is no problem and both the sink and tub seem to work ...
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1answer
22 views

fixing lead boot on waste vent

The lead boot around the waste vent has worn away. I have no idea how it happened, but I need to fix it. I was thinking of just buying another boot, cutting the bottom off, cutting the top of the ...
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0answers
32 views

Water level in kitchen sink drains is too high

The water level in both kitchen sink drains is close to the top. I can use the garbage disposal and other drain and the water drains out quickly but backs up slightly when the opposite drain is used ...
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1answer
48 views

Unclogging bathtub with an external tower drain

I have a clog in my bathtub. There is no visible overflow and it has an external tower drain. When I try to snake through the tub drain the snake comes up the external tower. Do I need to remove the ...
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2answers
151 views

House has no plumbing vent — is this a solution?

I've been living in a fixer-upper for a while... I've been fixing a lot that was previously done wrong. I've finally gotten around to ripping out our first floor bathroom (two full bathrooms) and ...
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1answer
49 views

Pre-made rain cap for plumbing vent? (Preventing rust-through of galvanized pipe in the walls)

Are pre-made rain caps made for plumbing waste vents? My house was built 1938 with galvanized DWV pipes which have a series of elbows before reaching the roof. All such elbows retain a certain amount ...
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2answers
95 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 ...
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2answers
98 views

How to plumb a washing machine 30 ft from the waste stack?

I would like to install a washing machine in my basement, about 30 feet from the main waste stack. The stack is fully accessible and already has a capped 2" port about 8" above the concrete floor. ...
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2answers
45 views

Is there a required spacing between waste vent line and chimney?

This question seeks answers with one of the following as supporting evidence: International standards, other standards widely recognized in multiple areas of the United States, or sound building and ...
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1answer
77 views

Toilet Still Gurgling

Three months ago when we moved into our home, the toilet started gurgling so we had septic tank pumped, and drainline from house to septic cleaned out. Two months ago, happened again, so we tried a ...
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1answer
57 views

Toilet bubbles and gurgles after capping vent stack

We had a bad wax ring on the toilet so we replaced that, then we decided to replace the toilet with a newer model. Now the toilet doesn't flush right--sometimes we have to flush it a couples of times ...
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1answer
82 views

What's the right way to clear a vent pipe?

There have been a number of answers pointing out that draining problems may be a blocked vent pipe rather than a clog in the drain per se. But I don't think there's been a clear answer on whether ...
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0answers
55 views

What's so bad about single stack DWV systems?

We're in a region which allows single stack DWV installations in multi-storey buildings. In other words, a single large-diameter vertical pipe that serves as both discharge stack and vent for several ...
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2answers
106 views

What is the Pressure Number (PN) of Shedule 40 and Schedule 80 PVC Pipe?

Does anybody know the pressure number (PN) of schedule 40 and schedule 80 PVC pipe commonly sold in the United States and Canada? The PVC in my part of the world is classified by PN number, and I'd ...
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1answer
44 views

Add drain line to existing Island fixture vent?

In CA, would code allow for a drain line to be tied into the vent line shown at the location of the red arrow below? Single family home. Happy to draw a picture of where that vent lines goes, if ...
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2answers
85 views

Tub drains very slow

I've been trying to fix a extremely slow draining bath tub for awhile, but still can't get it right. Here is the work that's been done: Ran 25 feet of cable from a power snake (drill powered) 3x's. ...
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0answers
9 views

Appropriate vent for 2 toilets [duplicate]

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 890.1320 l): Branch wastes and ...
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0answers
41 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 ...
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0answers
146 views

Back-to-back toilet problem in old house: replumbing to code

I have a 50 year old house, with some outdated plumbing that is causing me problems. (See this for specific problems) And here's the existing connection: I will be doing some bathroom work, and one ...
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0answers
81 views

Bathtub Overflow Works Only After Overflowing Tub

I have a strange problem with a new acrylic tub with a narrow slit overflow line built into the tub. Both the drain and overflow line appear to be clear and the vent stack checks out as well. I'm ...
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1answer
304 views

How vent bathtub trap when drain is routed under tub, directly away from best vent location?

I am … very slowly … thinking about replacing the probably circa 1950's galvanized steel drain pipes in my basement with PVC. In particular, I would like to replace the drain line under ...
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2answers
357 views

What sizes of DWV pipe are commonly used for (very) small residential homes?

One of the DIY projects I sometimes contemplate is replacing the ~45 year old galvanized steel drain pipe in my house with PVC DWV pipe and fittings. There is at least one slow, dipping leak I ...
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1answer
43 views

External stack pipe

My friend's house is about 100 years old and the cast soil stack is on the outside. Someone smacked it and there is a crack (with leaking) so we need to replace. Can this be replaced with a PVC or ...
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2answers
388 views

Is a P-trap required for a shower drain?

I take care of unwanted and abused pets, and occasionally I have to bathe them in a bathtub. Sometimes they go poop and it breaks up in the water so it cannot be scooped out. When this happens, I have ...
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1answer
317 views

Rerouting a plumbing air vent pipe

We're taking down a section of the wall between our kitchen and living room and we want to drop the 'bar height' down level with the sink. Unfortunately, the bulk of the section we're removing has ...
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2answers
69 views

Manifold all vent pipes in attic to have one pipe into roof

I'm building a new house, 2 1/2 baths, laundry room & kitchen. What size vent pipe would be needed to manifold all vents into one?
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0answers
51 views

Why does the Hartell Reservoir style pump require no venting, while the Little Giant Drainosaur does?

Why does the Hartell Reservoir style pump require no venting, while the Little Giant Drainosaur does? See links below for more info on pumps Hartell Pump Little Giant I am having a hard time ...
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1answer
173 views

Adding sink fixture to waste stack with existing sink fixture

I'm renovating our basement and I have a waste stack with a roughed in sink fixture trap arm. We are putting a wetbar on the other side of this wall probably around 2' to the left of this waste stack ...
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1answer
235 views

Bubble of air out of toilet when flushed

When I flush the toilet in the basement there is a big air bubble that comes up the toilet and it then drains slow; if anything else is running it almost overflows. The basement toilet was working ...
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4answers
919 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" ...
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1answer
105 views

How can I attach a new drain to a drain pipe that's fallen away from the tub?

Hello everyone, Noobie here and I think I shot myself in the foot! I wanted to replace the old drain with a new one so my almost 2 year can have bubble baths. I was able to remove the old drain ...
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2answers
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Does a plumbing vent need to penetrate the roof? (Can it penetrate a wall?)

We're going to move our washer/dryer to the garage (the front loader needs to sit on concrete to keep it from shaking our house to the ground). I'll need to add a washer drain to the garage for the ...
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2answers
754 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 ...
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2answers
1k views

What could cause a tubs drain to gurgle when the toilet is flushed?

One day after I used a bacterial enzyme degreaser/ septic treatment to clear slow draining bathtub drains I can hear gurgling in my master bath tub drain when someone flushes the toilet in the other ...
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0answers
115 views

Would you trust this PVC drain joint?

This is a joint for a 2" elbow underneath a unit-shower (in Japan.) The elbow is a special type which is clear, and using a blue glue shows the glue line so you can insure you have a good joint. An ...
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0answers
436 views

How can I connect dishwasher waste pipe to sink waste pipe?

I moved in recently in our new home and when we put the dishwasher on a gush of water appeared on the floor. I turned off the dishwasher and took a look under the sink to find the waste pipe was ...
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1answer
101 views

Should I cap one vent in a two vent stack?

I have relocated some fixtures in our house, and now have two 3" vent stacks in the same drainage route that leads to our septic system. I'm thinking that this may be a bad idea, . . . that it may ...
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2answers
543 views

Where should the main stack vent go?

Where does my primary stack vent go? Does it have to be at the end of the run? I have a pretty simple plumbing system. From the highest point to where the drain enters the house (lowest) I have Tub, ...
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1answer
225 views

how do I repair broken pipe under foundation

For a home built in 1965, with broken pipe under foundation, what is status of inserting a stent, perhaps under visualization?
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2answers
267 views

Toilet, sink and shower blocked

I live in a block of flats in China. I had a lot of friends over a couple of days ago and since the toilet, sink and shower are all blocked. The water on all those items does go down, but really, ...
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1answer
15k views

Persistent sewage smell coming from basement drain

I've recently purchased a house and am now learning all the ins and outs of home maintenance. This summer, I've noticed that I have a very smelly basement drain. Particularly, it smells like sewage. ...
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2answers
919 views

How can I stop this drain pipe from backing up?

In my basement laundry room is (to my knowledge) the only drain pipe in the whole basement, which hooks into the end of the main line as it exits the house and heads to the septic tank. When we moved ...
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votes
2answers
5k views

What can I do if drain alignment doesn't allow enough space for p-trap?

I'm remodeling my bathroom. The sink drainage come up from the floor. The alignment between that and the drain coming from the sink doesn't have enough space for a p-trap to be installed so it just ...
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votes
4answers
22k views

Sink tailpiece doesn't line up with trap

After installing a new bathroom sink, the drain tailpiece doesn't line up with the trap coming out of the wall. I've seen flexible accordion hoses for this, but I think that violates code ...
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1answer
91 views

Change direction between trap and vent

By code, I have 8 feet distance from a 2 inches trap to vent. These 8 feet must be straight? Can I change direction sideways or horizontal (sloped) to vertical and then horizontal again?
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3answers
4k views

Fix lead joint between cast iron and galvanized steel plumbing pipes?

I took out my bathtub to replace a rotted wall behind it, and the drain pipe fell out. (Yes, I unscrewed the drain fitting before removing the tub.) The joint under the concrete slab, where the ...
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2answers
3k views

How should I fill in a trench left by replacement of a sewer pipe?

I recently had my main sewer pipe that runs underground to the main pipe replaced, and I left it open for a few days to check everything is okay, and it seems to be. What is the best way to fill the ...
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3answers
3k views

How do I patch an in-ground ceramic drain pipe?

So tonight I was digging a post hole for a new fence tonight. And as I'm digging the hole I hear a hollow thump, crack. Behold: This pipe is a downspout drain pipe that runs from the front of my ...