Ask Experts Questions for FREE Help !
Ask
    david_plumer's Avatar
    david_plumer Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Feb 5, 2011, 01:01 PM
    How far should a p trap be from the drain?
    I have a kitchen sink and the p trap is in the crawl space about a 3 to 4 foot drop. When the water drains you can hear it some what gurggle. I was wanting to know if I move the p trap to about a foot away from the drain would the sound stop. Due to less fall?
    oneexception's Avatar
    oneexception Posts: 92, Reputation: 10
    Junior Member
    		  
    #2

    Feb 5, 2011, 01:28 PM
    It might, but the gurgling may not be from the drop. I have seen situations when the water that is draining through a horizontal pipe gets slightly airlocked and sloshes back and forth as it drains, causing the gurgling, even when the plumbing is properly vented. Can also be caused by an airlock from lack of a vent. However, that might not be the case with your situation. Unfortunately, sometimes you just need to go by trial and error until you get the results you are looking for.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #3

    Feb 5, 2011, 02:14 PM

    2006 upc code; 1001.4.. The vertical distance between a fixture outlet and the trap weir shall be as short as practical, but in no case shall the tailpiece from any fixture exceed 24 inches in length.

    Also, the trap must be properly vented.
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #4

    Feb 5, 2011, 04:37 PM

    Hi Guys...

    David, if the PTRAP is below the floor then there is a good chance that the vent connection is also below the floor so you will either need to move the PTRAP and connect into the existing vent ABOVE the floor, or you can move the trap up (be sure to remove trap under floor... no double traps) and install a mechanical vent, called an AAV (air admittance valve) above the floor. The AAV may not be code approved in your area so you will need to consider that, too.

    Most likely you should just leave it all alone...

    Let us know what you think about this, OK?

    Mark
    PlumbRob7's Avatar
    PlumbRob7 Posts: 5, Reputation: 2
    New Member
    		  
    #5

    Feb 5, 2011, 10:25 PM
    In Canada the fixture outlet pipe must not exceed 1200mm (4 feet). Also the length of the trap arm will affect the venting, the length cannot exceed the diameter of the drain... example: at 1/4" per foot of grade a 2" drain must not exceed 8' Or you will be s trapped which will restrict your venting. In other words too much grade on a trap arm will affect the venting.
    An air admittance valve probably won't help you out always avoid them As they are called cheater vents for a reason
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Connecting to 1 1/2" copper drain with pvc kitchen sink drain trap [ 8 Answers ]

I'm trying to rehook up the kitchen sink pvc trap to the old copper drain pipe but the connector doesn't fit tight enough and the water links out. Any ideas how to stop this leak?

Does my basement drain have a trap? [ 2 Answers ]

How can I verify that my basement drain has a trap? I live in a late 1960's home and I want to install a shower in the basement. There is what looks to be a 2.5 or 3 inch cast iron hub with a cap on it for a drain. It appears as though the basement was built with the intention of installing a...

Shower Drain Trap [ 3 Answers ]

I am installing a shower where a bathtub used to exist and the shower drain, including reduction fittings require me to drop the existing trap by 2.75inches. Are there any issues having a trap that drops 6inches? Thanks, Adam

P-trap GAP - p-trap too low to meet sink drain extension [ 13 Answers ]

I just took an old crane drexel sink off the wall and replaced it for the time being ( I want to fix the older sink) with a cheap vanity/sink set. All that was easy enough, but now to my chagrin I can't finish the job. The p trap is too low, the extension pipe from the sink doesn't go all...

View more questions Search