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
131
questions
0
votes
0
answers
19
views
Can I replace the swivel elbow of a p trap with a straight pipe
Can I replace the swivel part of a ptrap with a straight connection right into the drains of my two sink bowls? Basically like in the picture. The red line shows where the threaded swivel connection ...
1
vote
1
answer
56
views
Can I install a p-trap with AAV onto a horizontal sewer line?
I currently have a standpipe for a dryer (no p-trap and unvented) which connects (via some elbows) to a horizontal sewer line in the basement. I would like to (a) install a p-trap in the basement ...
- 634
0
votes
2
answers
89
views
Why are p-trap j-bends reversed depending on application?
Whenever I install P-traps under sinks (eg, usually inside a cabinet or the like, but outside of a wall, using threaded fittings), the asymmetrical J-bend has the straight side towards the drain and ...
- 197
0
votes
0
answers
31
views
Bathroom Sink Plumbing
I installed a new countertop and sink in my 20 yr old home. The existing sink drain pipe is 1 1/2 and it appears to be a Street fitting but with an edge on it to retain a threaded ring.
I have tried ...
- 23
0
votes
1
answer
72
views
My bathroom sink isn't aligned with the P-trap. Could that be causing the smell?
Total novice here. The sink in our bathroom often has a bad smell coming out of it.
We've done bleach as well as baking soda & vinegar, but it seems to keep coming back.
I noticed that the sink ...
- 3
0
votes
1
answer
30
views
What tools do I need to replace this rusted p trap
This sink is draining very slowly but this p trap seems rusted.
What tools and part would I need to remove this? Tried pliers and nothing seems to budge.
- 1
3
votes
1
answer
170
views
Nightly overwhelming sewer gas smell from shower drain only while in use
Ok here is a doozy we have been dealing with for over a year.
House was a new build 2012 and we had never had any plumbing issues until we had our roof replaced a bit over a year back and around the ...
- 31
0
votes
2
answers
86
views
Smelling sewer gases from my washer
Our front-load washing machine has a problem where sometimes it really smells of sewer gas. This only happens occasionally, and we can only smell it when the door is open. We usually leave the door ...
- 217
1
vote
2
answers
111
views
How to elongate IKEA sink downspout to reach P trap U pipe?
I inherited an IKEA sink and plumbing (boooo), and today I took it apart to clean it out due to clogging.
Unfortunately, it is now leaking no matter how hard I try to put it back together.
I believe ...
- 13
3
votes
2
answers
39
views
Do I need to remove a laundry standpipe trap before using the pipes for a sink?
We are renovating our basement and adding a kitchenette. The kitchenette space used to be where the washer and dryer were, as you can tell by the water, lines and drain stand pipe.
We plan on using ...
- 31
1
vote
2
answers
316
views
1-1/4 inch sink drain tailpiece into 2 inch p-trap in bathroom
TLDR - I want to replace a bathroom vanity that currently has a totally glued 2" p-trap (that is in good condition except for the oddness of the setup). Hoping I can use the p-trap as is by ...
- 13
0
votes
1
answer
193
views
Can I remove it without destroying it - Glued P trap on clogged old laundry sink
It’s an old concrete laundry sink with a glued PVC p trap (I’m assuming) and it’s currently clogged. Snake isn’t hitting anything and isn’t making it through the p trap. It looks like there is a no ...
- 3
1
vote
2
answers
172
views
Can the garbage disposal outlet be lower than the building drain inlet? [duplicate]
As shown in the diagram below, my kitchen sink garbage disposal has an outlet (#1 on diagram) which is about about half an inch lower than the inlet for the building drain pipe (#4 on diagram). Is ...
- 115
0
votes
2
answers
432
views
What type of trap adapter is needed to connect a brass tub drain to an ABS p-trap?
For a brass tub drain and overflow, how would one connect the brass tailpiece to transition to an ABS p-trap?
The issue is that the brass pipes seem to have a different outer diameter compared to ABS ...
- 300
2
votes
1
answer
175
views
Can I have a short horizontal arm between shower drain and p-trap to avoid an obstacle under floor?
I am trying to fit a 2in shower p-trap between floors with 2x10 joists. Unfortunately, I have a run of EMT electrical conduit directly (about 8in) below the drain; and, as a result, a standard trap ...
- 125
0
votes
0
answers
35
views
Double P Trap Unvented Under Slab
My kitchen sink has 2 p-traps that are unvented. One p-trap is under the kitchen sink, and the second is under the slab.
What should I do? I am concerned about toxic sewage gas, not a slow drain. It ...
- 1
0
votes
1
answer
155
views
Rusted kitchen basket strainer, mystery plumbing under the sink
This is existing under my kitchen sink; the basket strainer was completely rusted.
The tailpiece looks different from any I've seen before and wasn't even tightened into the trap. It almost looks like ...
2
votes
1
answer
107
views
Can I add a 2nd trap into existing with T for this cat fountain?
I am adding an automatic cat water fountain. The flow will be minimal, when this turns on by motion sensor.
Can I connect this fountain into the existing plumbing between the trap and the wall with a ...
- 123
0
votes
0
answers
29
views
Plumbing config - max trap arm to vent, top plate penetration, existing stack connection
Current Conditions
This is a slab foundation home in California and the kitchen is on the first floor. I am moving a kitchen sink to a new wall. It will be located beneath an existing window. To the ...
5
votes
1
answer
2k
views
Is P-Trap installed correctly? [duplicate]
Our bathroom sink is used multiple times per day but there is a bad odor almost every time we turn on the water, coming from p trap. We have found some bad DIY work in this house already, so I’m ...
- 51
8
votes
3
answers
2k
views
Alternative method for connecting sink drain with waste pipe directly under?
This seemed so much easier in my head before I started.
The sink drain is just about directly over the waste pipe. I glued this together with two 45s and a 2 to 1 1/2 wye. I need to connect an AAV to ...
- 173
1
vote
1
answer
182
views
Is it ok to have just one big P trap at the outlet of building
My house doesn't have P trap for kitchen sinks/bathroom sinks etc..
So instead of placing a p trap for each. May I just place one big p trap where the water is discharged from the building to outside.
...
- 87
0
votes
1
answer
54
views
Finding the ptrap to unclog the kitchen sink
I am trying to unclog my kitchen drain and unsure if the black section in the first picture is the p-trap or not? I am trying to avoid opening up something that I should not be trying to open up. I ...
- 145
0
votes
2
answers
2k
views
Is my sink trap leaking because it's missing a seal?
I have absolutely no clue about plumbing so I apologize if any of the terms I use are wrong.
My p-trap is leaking, the outlet side threads on to the pipe in to the wall, but the inlet side just pushes ...
- 135
2
votes
2
answers
440
views
P-Trap missing on laundry drain / sewer smell
I moved into a new home with laundry room in basement and started to notice occasional wafting of sewer gas out of the laundry drain pipe. It is an older home built ‘58. It looks like there is no p-...
- 29
1
vote
2
answers
79
views
Installing Drain For Sink
in a utility room at my home there is the water line and sewage line capped off bc they were not being used. What I want to do is add a utility sink in this location.
Cutting the water, cutting the ...
- 541
0
votes
0
answers
141
views
Can the standpipe for washer be relocated without moving ptrap?
In my area, the ptrap arm length (section between waste stack and ptrap) is limited to one foot per 1/4” of the pipe’s inner diameter. (at a 1/4” per foot slope)
I want to move my washer a bit further ...
- 541
0
votes
0
answers
29
views
Sink gargle after draining or when flushing toilet
I have recently installed a new vanity but had to extend the trap back to the drain as it didn’t line up like it did before replacing the vanity. Before it never made noise when draining or flushing ...
- 69
1
vote
2
answers
290
views
Sink Trap Leak After Faucet Replacement
I just replaced my bathroom sink and added new faucet which came with drain kit. I can’t get the circled connector to stop leaking and it really feels like the new drain pipe is just too small to have ...
- 21
1
vote
1
answer
195
views
Basement Shower Drain Rough In
Our basement rough in for the shower drain has it located right where we want it, but it has no p-trap installed yet. I am unsure what I can do to add the p-trap but keep its location. I'm trying to ...
- 11
7
votes
2
answers
997
views
Transparent P-Trap to help diagnose smell issue is wrong size
What I've tried so far
I have this P-trap that I thought was standard. I bought a transparent replacement described as "Fits 1-1/2 in. or 1-1/4 in. ABS" but the fitting (reducing gasket) was ...
- 2,063
5
votes
3
answers
6k
views
How do I adjust plumbing when converting a double kitchen sink to a single?
We will be installing a single under mount sink with garbage disposal. Converting from the current double basin sink.
I'd like to tackle this project if possible. My idea was to cap the right existing ...
- 51
1
vote
3
answers
3k
views
Can I connect a plastic p-trap to metal pipes?
This is the current situation...(this is a an old cask iron slop sink that came with the house.)
There was a leak and we thought it was the p-trap...so we decided to get a PVC one.
The other pipes ...
- 4,912
0
votes
1
answer
112
views
How should I replace this jerry-rigged Trap?
The downstairs bathroom vanity in my 60s era house leaks, I am going to replace the entire vanity. This should be quite straightforward with the exception of the P Trap (pictured).
The P Trap looks ...
- 111
2
votes
1
answer
330
views
Raising p-trap that is too low in 2nd floor joist
I removed a large light structure from my 1990s kitchen ceiling in order to install canless led lights and learned the p-trap from the shower in the floor above rests 5" below the joists ...
- 21
0
votes
1
answer
524
views
How best to brig old Pex water lines up to code / safety
My house in in western New York state. I'm trying to deal with the hack job that the previous owner or flipper did on my house with respect to the water supply lines in the kitchen (hot to sink, cold ...
- 97
4
votes
2
answers
121
views
Is this a good way to plumb a garage sink and stop existing sewer gas smells?
The builders or previous owner of my house had the water that drains out of the A/C going through a 1" pipe that was simply sitting inside a 2" pipe (cut just 2" above the slab). A ...
- 167
2
votes
2
answers
211
views
P-trap installation - faucet tailpipe close to stubout [duplicate]
Installing a new vanity and luckily the faucet tailpipe remains centered on the stubout, but they are very close to each other depth-wise. Maybe 2” above the Stu out and 2” in front of it. Not really ...
- 41
2
votes
1
answer
95
views
Removing metal p trap from PVC stubout
I am replacing a p-trap and am having trouble removing the metal trap arm (?) from the PVC stubout. The metal trap arm is threaded onto the PVC. I tried using pretty full strength to twist/unthread ...
- 41
10
votes
2
answers
4k
views
How long must the horizontal run be to make an S-trap a P-trap?
In this fantastic bit of MS Paint artistry, I've shown an S-trap and a P-trap. In my humble opinion, the only difference between them is the horizontal run between the top of the upflowing bit of pipe ...
- 43k
-1
votes
2
answers
332
views
Collar between shower drain and p-trap?
I am renovating a small bathroom, including a shower. I am needing to replace the shower drain assembly, but it is a very tight area to do much work in, with no access from underneath. The current ...
- 25
5
votes
2
answers
1k
views
Do I need water traps on my sinks with dry-well greywater collection?
My house has been fitted with water traps in toilet and bathrooms drains which is quite good, but I can see that my kitchen sink, washing machine outlet pipe and regular wash basin don't have water ...
- 225
1
vote
1
answer
1k
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 ...
- 294
0
votes
1
answer
1k
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 ...
- 294
1
vote
2
answers
2k
views
Is it ok that a new deeper sink disposal line is the same height as drain line?
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 ...
- 11
2
votes
1
answer
323
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 ...
- 559
2
votes
1
answer
137
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 ...
- 21
1
vote
2
answers
97
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 ...
- 415
9
votes
1
answer
2k
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 ...
- 666
1
vote
1
answer
62
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, (...
- 21