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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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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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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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 ...
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367 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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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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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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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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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 ...
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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 ...
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12 votes
2 answers
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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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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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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 ...
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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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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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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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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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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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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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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)? ...
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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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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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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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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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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 ...
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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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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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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 ...
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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 ...
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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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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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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 ...
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11 votes
1 answer
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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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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--...
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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 ...
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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 ...
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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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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 ...
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6 votes
1 answer
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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 ...
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2 votes
2 answers
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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 ...
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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 ...
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HVAC Condensate Line P Trap

I've consistently experienced issues with my AC. I won't get into all of the background, but I would like to know if the pictured condensate line is appropriately trapped. The vertical PVC pipe is not ...
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3 votes
1 answer
416 views

Is this plumber's putty?

Is this giant mess made of plumber's putty, and if so, what can I expect to find behind it if I chisel (or Dremel) it off? It has a slow leak so I'd like to fix it, but I'm not sure what it is, and I'...
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New garbage disposal drain is a bit higher than stubout on wall

So I'm in a basement that is below the drain-level of the house, and there's a small kitchenette, bathroom, and thus a sump pump. I decided to in garbage disposal unit (there wasn't one before) in ...
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How to repair leak between P-trap arm and drain pipe

I recently replaced my bathroom faucet including the water supply lines and I now have a slow leak from the drain pipe/P-trap connection. I'm thinking I must have accidentally bumped the P-trap or ...
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Laundry drain smells like sewer after washing clothes

I have an in-wall laundry drain - pictured below. Since we moved in it had a significant clog which I unclogged with a combination of wet-vac sucking on the drain and snaking the vent pipe. Finally we ...
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P trap won't drain from water softener

I installed a water softener in a house we just moved into. I did a manual regen to test everything and nothing or at least very little drains past the P Trap and is pouring into the crawl space. I ...
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How do I plumb this kitchen sink to stop the leak and improve drainage

I'm trying to stop this setup from leaking and improve the drainage. The sink is a bit low, and the basket strainer drops a few inches. Below that, I have a tailpiece with a dishwasher connection, ...
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Is my sink trap too high?

Hello I renovated my kitchen and had plumbing moved and replaced. Didn’t really think about the height of the waste pipe before cabinets sink and countertop went in. With new sink and disposal ...
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What is the best way to rebuild this shower drain?

Converting a tub to a shower, and with the drain location changing I'm just getting back to the underbelly and seeing the alignment of things before hooking it all back up. You can see the new drain ...
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