Questions tagged [p-trap]

A P-trap is an elbow inside a drain that is designed to hold water to prevent sewer gases from making it back up the sink. The trap then empties into the drain line at the wall, perpendicular to the sink drain (looking like the letter "P" turned face down). Use with the [plumbing] and [drain] tags

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1 answer
34 views

Fixing a leaking p-trap when the outlet pipe has a lip on it

I am installing a new bathroom sink and it is leaking in two parts, at the faucet drain and at the p-trap. I will ask separate questions for each of these as I believe it is a different solution at ...
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1 answer
37 views

P-trap fits sink drain and tailpiece but do not fasten to them securely

Installing a bathroom sink. I have a tailpiece/downspout that I'm attempting to connect to a p-trap, and then subsequently connect the p-trap to the drain sticking out of the wall: The p-trap I have ...
1 vote
2 answers
114 views

Installed new deeper sink and now disposal line is the same height as drain line. Is what our contractor did okay?

So we're remodeling our kitchen and my wife insisted we get a new farmhouse sink. We had a contractor install the new sink and after getting it put in he mentioned that the disposal line is about the ...
2 votes
1 answer
81 views

Two P-Traps on Single Vent?

I am replacing the old washing machine drain stand pipe, p-trap and clean-out. I am adding a utility sink to the garage laundry area washing machine vent stack. Am I creating a possible issue by ...
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2 votes
1 answer
92 views

Why there is a wye under a pedestal?

Is there a reason why the builder used a wye under the pedestal with one end capped with a mechanical cap. The P-Trap is located under the floor. I’m replacing the pedestal with a vanity. Do I need ...
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1 vote
2 answers
74 views

Reduce clogging in kitchen sink

My kitchen sink recently clogged for the first time. I'm sure it will be easy enough to clear the clog by disassembling the trap and clearing it out. I might also replace the existing trap with one ...
9 votes
1 answer
947 views

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

I have a p-trap that has an outlet that ends too close to the wall for it to be able to be connected straight into the trap adapter of the vent inside the wall. I'd like to avoid the non-code ...
1 vote
1 answer
30 views

Proper Flow under Kitchen Sink connected to Disposal

Hi all, I really appreciated the feedback on my last post pertaining to bathroom sink p-trap, so I thought I'd try to get some advice on this situation. It's been like this since we've moved in, (...
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2 votes
2 answers
74 views

Is there a limit to the change in direction of a p-trap assembly at the vertical swivel?

I have some IKEA vanities and they are extremely particular about the placement of the p-trap. The p-trap has to be very close / parallel to the wall for the drawers to not bump into the p-trap. I've ...
1 vote
1 answer
80 views

Is it possible to correct [flip] this P-Trap?

So I've realized this bathroom sink p-trap was installed incorrectly, but based on the geometry, I cannot flip it to the way it's supposed to flow... I even hacksawed the vertical pipe [grey] ...
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1 answer
159 views

Does direction of p-trap matter?

I have a very space-limited situation for a bathroom sink. My 4" vent stack is inside the wall immediately to the left of my sink (~18 inches away, probably less). If my sink's tail piece is ...
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5 votes
1 answer
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Can I remove the Bottle Trap if I already have a P Trap?

I recently moved into a new flat and it has 2 sinks that are plumbed as such: As far as I understand, both the Bottle Trap and the P Trap serve the same purpose, so in this case the Bottle Trap is ...
5 votes
2 answers
385 views

What is this coming off the drainpipe near the p trap?

A small repair is going on, but what is this other pipe coming off the drain pipe near the p-trap?
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1 answer
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How to replace under sink plumbing?

I need to replace the trap under my kitchen sink with one with a horizontal nozzle. However, the new trap won't quite fit. The existing situation is in the below photo. The outgoing pipe from the ...
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5 votes
2 answers
2k views

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

I'm a real novice when it comes to plumbing. I've got a threaded 45 coming out of the wall (white pipe on the right) and an unthreaded black tailpiece coming down from the sink. How do I install a P-...
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71 views

can I right turn the p trap?

I am putting a shower where I have to take a right turn (because of the distance between the p-trap and drain pipe is very small I had to take a right turn) on the top of the p trap to tie into the ...
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2 answers
139 views

How can I troubleshoot a smelly shower drain in a tiled walk-in shower?

I had a plumber out. They told us use an enzyme down the drain. We used a whole bottle. It helped a little for a while and then the smell got really bad again. They did a smoke test and said that the ...
1 vote
1 answer
79 views

How should I redo plumbing to fit new garbage disposal?

Planning to replace InSinkErator Badger 1 garbage disposal with Evolution Compact and it appears they have slightly different dimensions (5" vs 5-3/4"): How do you recommend changing this ...
12 votes
2 answers
2k views

Is my p-trap installed correctly?

I just moved into a new house and am having a problem where the sink takes longer than normal to drain. Also, while using the shower, there is a gurgling from the sink. I tried some drain cleaner, but ...
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158 views

1-1/4 brass sink drain pipe stuck in larger cast iron elbow--threaded or not?

Attempting to replace p-trap in bathroom, 1954 ranch on slab. There is a 1-1/4 brass drain pipe "stuck" into larger cast iron elbow in wall. The brass pipe is short, no longer perfectly ...
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2 votes
2 answers
397 views

Wall drain too high for p trap

Appears my wall drain is set too high to meet my p trap. I assume I will need to decrease the vanity sink drain some but either way the current p trap would land on the sink drain tightening nut. I ...
1 vote
0 answers
71 views

Is this a good enough P-Trap

This is the plumbing under our bathtub. We are getting strong sewer gas odors in the bathroom above this plumbing. Sometimes I can smell it coming from the tub and sometimes not. Is there a chance ...
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1 vote
0 answers
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Garbage Disposal Housing Touching Drain Pipe

I have just taken out an old insinkerator badger 5 and I'm replacing it with a evolution select from Home Depot. First some pictures: Overall situation: A closer look at the drain: From underneath: ...
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What parts do I need for a bathroom sink trap?

I'm replacing the bathroom vanity cabinet, sink and countertop, located between two walls. Picture below. I plan to cut the current p-trap arm, leaving enough of it sticking out of the cabinet to ...
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1 answer
178 views

Draining a bath into existing floor drain and possibly retaining us

I have an existing bathroom with sunken shower area 30" x 72". I will install a drop-in bath into this area (procedure: four brick walls, tile on the open wall, plaster base to support). ...
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2 votes
1 answer
464 views

Bathroom p-trap 2in male to 1 1/4 in drain outlet

I am trying to replace pipes and trap in my bathroom sink. For some reason the drain is connected via a 2in male threaded pvc pipe. On the other end I have a "standard" 1 1/4in metal pipe (...
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2 answers
429 views

Does sealing an apartment floor trap cause clogs in the main drain line?

There was a waste water leak initially from the top of P-trap that belongs to our neighbour upstairs. When the handyman came to seal the gaps, they knocked the pipes and the sounds made from the main ...
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3 votes
2 answers
377 views

Leaky p trap, no bevel at connection point

The p trap in my kitchen sink started leaking at the rear connection point. When I unscrewed it to see what was going on, there was no bevel on either end of the connection. I don’t know how the seal ...
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1 vote
1 answer
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What is this white hard build up on my rest room basin trap?

Someone please tell me what is this build up ? Why is it build up outside of pipe ? There is no leaking and no hole.. The greenish i suppose is copper (that means this trap has got some copper in it)? ...
1 vote
1 answer
826 views

Can I use a 90 degree elbow between the tail pipe of bathroom sink and the trap?

I live in a large Travel Trailer and would like to have more space beneath the sink for storage. I'm buying a top mount rectangular vessel sink with hand pressed pop up drain plug no mechanism from ...
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6 votes
2 answers
3k views

How can I remove a cement-welded sink trap?

I could use some help figuring out how to remove the trap under my bathroom sink from the wall. It looks like all the connections from the trap are unthreaded connecting to the outlet/wall. I've ...
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2 votes
2 answers
587 views

installing a P-trap for the washing machine with this layout, will it convert to S-trap or causing problem?

Because there is a badly smell from the pipe and I have just learnt that it is probably due to lacking of trap. Here is my kitchen pipe. The waste output is shared with the dish washing sink. The ...
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1 answer
213 views

Combining (dry) vents for fewer roof penetrations

I am remodeling and in the process need to move part of the vent stack. A simplified sketch of my existing plumbing situation across multiple floors is shown (pencil). I am proposing to eliminate vent ...
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1 vote
1 answer
4k views

AC drip pan not draining until p-trap cap is opened

We had our AC replaced and have been having some issues. Currently it seems like the drip pan isn't draining until I pop open one of the clean out ports on the higher level on the p-trap that was ...
0 votes
2 answers
232 views

Installing a Reverse Osmosis (RO) system under sink, should the feed connection go after or before the dishwasher connection?

Not sure if it matters, but do I connect the RO systems feed water connection before or after the dishwasher feed water connection. Also, where’s the best place to put the drain saddle?
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1 vote
3 answers
228 views

Slip Joint Reducer Washer too thick / Nut too thin

I've been trying to replace a corroded bathroom sink drain. From my wall I have a 1 1/2" threaded PVC or plastic pipe. I have been attempting to attach this to the elbow from my p-trap kit using ...
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2 votes
2 answers
175 views

Plumbing a modified S/P Trap? With a Vent on the ‘P’?

I have a couple plumbing questions. I’m adding in a washing machine and sink. My space is tight and in the right bay where the Sink Drain is above is an electric panel. The part out of the wall I was ...
0 votes
1 answer
122 views

Removed old vanity and installed new vanity and there is limited space to install new P-trap

As noted, I have installed the new vanity, and the space between the new sink drain and the wall is very limited (4.5 inches to center of the new sink drain). I thought I could just go on the other ...
1 vote
0 answers
36 views

Smell from laundry drain, possibly no vent?

Just purchased a home that was renovated. Appears to have not been by a professional, nothing major but small things. Not sure what to do on this one. There is a smell coming from the in wall drain....
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3 answers
1k views

P-Trap into Wall Marvel Connector Leaking

I discovered a leak under my bathroom sink. There are two sinks in the bathroom with the same plumbing set up and only the one side is leaking. The water is coming from the marvel connector on the ...
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2 votes
2 answers
4k views

Can I use horizontal 90 degree elbows to run a p trap along a wall?

Off center vent stack (see picture). Can I use a 90 degree elbow out of the vent stack, run drain pipe along the wall, and then another 90 degree elbow so that the p track will point directly ...
11 votes
1 answer
2k views

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

Part of my problem is not knowing the names of what I'm referring to, so feel free to suggest title edits please. A bathroom sink is draining very slowly after someone bearded shaved, despite them ...
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1 vote
1 answer
956 views

Can an AAV be in a crawl space if the P trap is also in the crawl space?

I have a situation where the P trap to the washing machine is in the crawl space instead of in the wall. There is no vent. I thought about adding an Air Admittance Vent in the wall (see diagram--...
0 votes
1 answer
2k views

Will a doubled P-trap cause problems if it has a vent between the traps?

Our plumber discovered that the drain pipe under our bathroom sink (which is done properly with a P-trap and vent) has a second P-trap down in the crawl space, which is incorrect. I've been ...
1 vote
1 answer
212 views

Should I install a drain trap on the main pipe before it exits my home?

So my father-in-law and I are going back and forth.. I plan on redoing my entire main plumbing. When I purchased the house we remodeled the bathroom and had a plumber run a new schedule 40 stack and ...
1 vote
1 answer
631 views

Double vanity shared P-Trap

I've seen a couple conflicting answers here for whether or not a second p=trap is necessary, my understanding is 30" is the max distance between drains to share a p-trap, which my vanity is. I ...
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1 answer
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Installing bath sink draining for pedestal when drain does not line up

I have install a pedestal sink in my basement half bath. The drain pipe is perpendicular to the sink and the p-trap does not extend out far enough from the pedestal to allow for connecting. What are ...
6 votes
1 answer
935 views

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

I installed a new vanity and the drain tailpipe does not line up with the P trap. Can I use two 90 degree elbow fittings to make this connect? Can elbows connect to elbows directly or does it require ...
2 votes
2 answers
399 views

What kind of j-trap will fit this pipe?

The quarter bend is threaded and has, at the threaded end, an exterior diameter of approximately 2.5" while the pipe itself is more like 2.375" OD, so I believe this is 2" PVC. It is ...
0 votes
0 answers
244 views

Plumbing a 60inch double vanity with one or two p traps

Here is my layout. I have one drain on the right side of the vanity coming through the floor. If I come up to TEE WYE Going to The left sink with a pipe run that is 40 inches hooking to a p-trap then ...