(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 11 of 11

Thread: P-Trap Drain Not Draining Issue

  1. #1
    DIY Junior Member jms87's Avatar
    Join Date
    Apr 2013
    Location
    Cambridge, Ontario
    Posts
    6

    Exclamation P-Trap Drain Not Draining Issue

    I have a p-trap drain in my restaurant that isn't draining, when we disconnected the dishwasher drain hose water sprayed out of the drain end like it was under pressure. The dishwasher had not been run for over a week. I have taken the trap apart, snaked it out. I have also snaked all the other lines of this system yet the drain just fills with water. I don't believe any water is leaving through this p-trap, the water will over flow over the top of the drain line if I continued pouring water. I will attach a picture I think the issue is someone has tied this "drain" into a vent line. I have a two vent pipes in the sink area (very close together), one on the other side of the wall before the grease trap and one after the grease trap before the exit to the sewer. ant suggestions? Thanks!
    Attached Images Attached Images  

  2. #2
    In the Trades Tom Sawyer's Avatar
    Join Date
    Nov 2010
    Location
    Maine
    Posts
    2,938

    Default

    The drain is plugged and you will need to call someone with the right equipment
    [B]No, plumbing ain't rocket science. Unlike rocket science, plumbing requires a license[B]

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,195
    Blog Entries
    1

    Default

    Have you checked to see if the grease trap is allowing water in?
    It may be time to clean it.

  4. #4
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,631

    Default

    "Connecting to a vent" if it is installed properly, does NOT cause drainage problems. you have a drain line stoppage. I hope the dishwasher drain line is not "connected" to the system without an |"air gap", so that any "backflow water" could contaminate the dishes.
    Licensed residential and commercial plumber

  5. #5
    DIY Junior Member jms87's Avatar
    Join Date
    Apr 2013
    Location
    Cambridge, Ontario
    Posts
    6

    Default

    Quote Originally Posted by Terry View Post
    Have you checked to see if the grease trap is allowing water in?
    It may be time to clean it.
    Yes the grease trap is open, I have 2 dishwashing sinks and one hand washing sink that goes to the trap with no issues. So only place a blockage could be is at the bottom of the pipe shown on the left, yet all the other sinks drain through the main also...
    Last edited by jms87; 04-10-2013 at 11:40 AM. Reason: sinks to 'sink'

  6. #6
    TROJAN WORLDWIDE SALES RP MACPLUMB 777's Avatar
    Join Date
    Aug 2007
    Location
    Houston, Texas, United States
    Posts
    631
    Blog Entries
    1

    Default

    The drain pipe is much more then just at the bottom it will run out 5,10, or more feet and any or all of it could be clogged with grease and that is why you need a professional drain person to clear the drain !

    MACPLUMB 777

    E-MAIL
    JERRYMAC@TROJANWORLDWIDE.COM


    35 YEAR MASTER PLUMBER, HEATING, ELECTRIC, DRAINS, FIRE SPRINKLERS, WATER HEATER
    AND BOILERS SINCE JAN, 1989

    281-706-1631 7 DYS A WEEK SALES AND TECH. SUPPORT
    Trojan Worldwide Web Site


     



  7. #7
    DIY Junior Member jms87's Avatar
    Join Date
    Apr 2013
    Location
    Cambridge, Ontario
    Posts
    6

    Default

    Quote Originally Posted by MACPLUMB 777 View Post
    The drain pipe is much more then just at the bottom it will run out 5,10, or more feet and any or all of it could be clogged with grease and that is why you need a professional drain person to clear the drain !
    This p-trap drain line is after my sinks, before my grease trap yet all the sinks drain with NO issue. So if a clog is present it has to be at the bottom of the line shown on the left, which is about 12-18" long?

  8. #8
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Location
    Land of Cheese
    Posts
    3,142

    Default

    The clog is likely right there in one of the bends in the line .

    I would cut out a section of the vertical vent line and rod the drain, and then install a cleanout where I cut the line for the next time it needs to be done.

  9. #9
    DIY Junior Member jms87's Avatar
    Join Date
    Apr 2013
    Location
    Cambridge, Ontario
    Posts
    6

    Default

    Quote Originally Posted by cacher_chick View Post
    The clog is likely right there in one of the bends in the line .

    I would cut out a section of the vertical vent line and rod the drain, and then install a cleanout where I cut the line for the next time it needs to be done.
    I'm in the process of doing this, having a hard time finding 1 1/2 PVC Fittings here, can I use ABS if its only for the vent line? No water flow. I have cleaned my grease trap and it was quite bad so I bet there is a clog at the bottom of the line.

  10. #10
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Location
    Land of Cheese
    Posts
    3,142

    Default

    There is a special transitional cement for bonding PVC to ABS. I would look harder for the PVC fittings first.

    If you want to do some trading, I could use a couple of ABS continuous waste with end outlet kits. ABS is quite uncommon here.

  11. #11
    DIY Junior Member jms87's Avatar
    Join Date
    Apr 2013
    Location
    Cambridge, Ontario
    Posts
    6

    Default

    I found the PVC fittings, had to call the local pluming store (One Stop Plumbing).
    I found there was a clog in the bottom of the line, and this is why the p-trap wasn't draining. I was able to free it up using my snake, and I also got good drain cleaner and put it down all my drains.

    Thanks for all the suggestions everyone, much appreciated. I will now keep an eye on the grease trap and maintain it.

Similar Threads

  1. Slow draining tub a vent issue?
    By diyright in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 8
    Last Post: 01-02-2013, 03:12 PM
  2. shower to tub drain issue ( 1 1/2 to 2 p-trap)
    By clapfc in forum Shower & bathtub Forum & Blog
    Replies: 4
    Last Post: 11-27-2012, 12:10 PM
  3. Toto toilet tanks not draining when flushed - flapper issue?
    By Melissa2007B in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 09-12-2011, 10:59 AM
  4. 3 compartment sink draining problem with grease trap
    By pizzaworker in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 7
    Last Post: 10-13-2010, 07:23 PM
  5. Tub draining issue
    By lissiealkie in forum Shower & bathtub Forum & Blog
    Replies: 1
    Last Post: 09-18-2005, 02:10 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •