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32 votes
Accepted

How can I remove a cement-welded sink trap?

Cut it off. That's all apparently built with cement-welded joints. There is no practical way to un-weld them. I would cut the pipe immediately downstream of that coupler near the wall and cement on a ...
isherwood's user avatar
  • 142k
18 votes
Accepted

Under sink has cylindrical fixture instead of J-pipe, what is it and how to clear it out?

That is a drum trap. [Evidently also called a bottle trap in some parts of the world, per comments] They are rather old school, and out of favor in code now. I'm more used to finding them embedded in ...
Ecnerwal's user avatar
  • 222k
14 votes
Accepted

Is my sink P-trap too low?

Bring your Ptrap up or your Sanitary Tee down. AS noted by others you can cut the tail of the piece where it goes into the top of the Ptrap shorter ( thereby bringing the Ptrap up ), This will ...
Alaska Man's user avatar
  • 13.7k
14 votes

Is my p-trap installed correctly?

Didn't know about trimming tailpices to fit, leading to odd arrangement with more pipe than needed. And more critical; that's an S trap now. The pair of vertical elbows at the wall entrance is a ...
Ecnerwal's user avatar
  • 222k
13 votes
Accepted

Connecting a p-trap via bending the drain stem vs the trap arm?

It's standard practice to use one or more horizontal bends on the drain stub (trap arm) to gain alignment. In this case, a single 45° elbow toward the camera should do nicely. You'll swing the trap ...
isherwood's user avatar
  • 142k
13 votes
Accepted

Alternative method for connecting sink drain with waste pipe directly under?

Since this is NOT buried in concrete, don't use a glue-together trap at all. Problem the first (apart from what you mention) is that the vent is too close to the trap - it needs to be at least 2 pipe ...
Ecnerwal's user avatar
  • 222k
12 votes

Is my sink P-trap too low?

In the OP's installation the last horizontal run going into the vertical drain appears to be slightly higher than the horizontal run coming from the disposer. I think this will cause the horizontal ...
Jim Stewart's user avatar
  • 22.1k
12 votes
Accepted

How do I connect my sink to the drain in the wall?

Go to your local big-box store (or even better, a locally owned plumbing supply place) and get a standard P-trap kit. It will include all the pieces you need as well as instructions on how to install ...
FreeMan's user avatar
  • 47.7k
11 votes

Can elbow fitting be used to line up drain tailpiece with trap

The best repair for this problem is to cut the trap from the drain pipe, glue on an ABS 1 1/2 inch (or same pipe diameter as existing pipe) coupling and than a short section of new pipe long enough to ...
ojait's user avatar
  • 11k
11 votes
Accepted

How long must the horizontal run be to make an S-trap a P-trap?

Those are both S-traps, since you have not drawn a vent, which is what actually makes the difference. Most P traps in finished locations have vents in the wall you can't see. Without a vent, if enough ...
Ecnerwal's user avatar
  • 222k
10 votes

How do I plumb this kitchen sink to stop the leak and improve drainage

try setting it up like this. you will have to trim the dishwasher feed tail pipe a bit (be sure to bring it up high like @DMoores pictures to keep the sink from draining into the dishwasher.
mark f's user avatar
  • 2,275
9 votes

Alternative method for connecting sink drain with waste pipe directly under?

Ended up moving the waste pipe in the basement for a cleaner look. Let me know what you guys think.
Paulz's user avatar
  • 173
8 votes

Do I need water traps on my sinks with dry-well greywater collection?

Not only you should have water traps (called P-trap) But you should also have air vents pipes up to the roof, to assist water drain. Some appliances like toilet come with water trap build in, for ...
Traveler's user avatar
  • 18.2k
7 votes

Is my sink P-trap too low?

You DO realize you can (perhaps even "are supposed to") cut excess length from the slip-fit trap parts? They are supplied long, but don't need to STAY that way. You can cut most of the tube leading to ...
Ecnerwal's user avatar
  • 222k
7 votes

How long must the horizontal run be to make an S-trap a P-trap?

As already mentioned, the P-trap requires a vent on the horizontal section, or it's still just a long S-trap. That said, you can't just put a vent on the top bend of an S-trap, since that results in ...
Nuclear Hoagie's user avatar
7 votes

Transparent P-Trap to help diagnose smell issue is wrong size

Your likely problem is indeed improper venting. You ask about ways to diagnose and confirm the problem. When you have a foul smell, drain the P trap and measure the amount of waste water removed. You ...
P2000's user avatar
  • 16k
7 votes

Is P-Trap installed correctly?

This is not the correct way to install a p-trap. The pipe exiting the sink should run vertically into the top of the p-trap, then exit the p-trap horizontally back into the wall and connect to the ...
pdd's user avatar
  • 6,059
6 votes
Accepted

How do I plumb this kitchen sink to stop the leak and improve drainage

If you reconfigure so that the trap connects directly to the tailpiece you'll have all the height you need. In fact, you'll need a tailpiece extension (or new, longer tailpiece). Clean up all the ...
isherwood's user avatar
  • 142k
6 votes

Is my p-trap installed correctly?

@Ecnerwal hit several of the big issues here but there may be more. There is definitely a venting problem. A good rule of thumb on venting with a P trap is if the P trap can't "see" the ...
HoneyDo's user avatar
  • 8,806
6 votes

How do I adjust plumbing when converting a double kitchen sink to a single?

Your dishwasher will connect to the port on your disposal unit (green arrow) and the drainpipe/crosspiece from the double sink (marked with red "x") will be discarded. The tailpiece from the ...
gnicko's user avatar
  • 5,660
6 votes

Kitchen sink slow drainage and P-Trap installation

Flex pipe is a disaster that usually doesn't wait long to happen. What you have now constitutes an S-trap. The outlet of the P-trap should be slightly above the drain entry in the wall. About a 2% ...
Ecnerwal's user avatar
  • 222k
6 votes

I'm replacing a bathroom faucet drain, but the p-trap has no nuts + trap arm is leaking

Grab a hacksaw and cut pipe G as neatly as possible and as close to the edge of coupling F as you can (run the blade against the side of F as your guide to cut nice and straight). Remove the whole ...
FreeMan's user avatar
  • 47.7k
5 votes

Is this plumber's putty?

Plumber's putty is usually soft. If it is hard (you mentioned chiseling it off), it's more likely some sort of epoxy putty that someone used to try to repair a broken pipe, and those things rarely ...
JRaef's user avatar
  • 15k
5 votes

Transparent P-Trap to help diagnose smell issue is wrong size

As mentioned, you need to vent it properly, and retrofitting is easier with an Automatic Air Vent (AAV). Just to show you what it may look like (I am not associated with it). Grabbed from Waste ...
Rohit Gupta's user avatar
  • 6,580
5 votes
Accepted

My bathroom sink isn't aligned with the P-trap. Could that be causing the smell?

The fact that it's an S-trap with no vent is far more likely to be the root problem than the horizontal offset (which is certainly odd in itself) is. Assuming you're not up for running a proper vent, ...
Ecnerwal's user avatar
  • 222k
4 votes

Is my sink P-trap too low?

The flange piece connected to the sink looks like it isn't mounted flush and could cause leaks. Readjusting the garbage disposal might fix that. It also looks like you have enough room to get rid of ...
JACK's user avatar
  • 82.9k
4 votes
Accepted

Will this sink piping configuration result in standing water in the pipe?

I'll try to answer your questions as stated. Minimum height difference I'm not sure if there is a code for this, but it's good practice to have the bottom of the disposal drain higher than the top ...
JPhi1618's user avatar
  • 28k
4 votes
Accepted

Drain trap leaking at compression joint

Try loosening the chrome nut at the wall and then reset the trap and tighten it up. I know "they" say to hand tighten but if the two pieces don't line up perfectly, then a little help is needed. Give ...
JACK's user avatar
  • 82.9k
4 votes

How to make the P-Trap sloped

Most of them are 89 degree bends (not 90 degrees) so they have about 1 degree of slope which is all that is needed. most diagrams exaggerate the slope so that the reader can see it, and so that the ...
Jasen's user avatar
  • 22.1k

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