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Thread: Water backup into basement floor drain after jetting lateral and sanitary sewer

  1. #1
    DIY Junior Member sm2327's Avatar
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    Default Water backup into basement floor drain after jetting lateral and sanitary sewer

    Single family home, built 1994 (I understand most likely all PVC piping due to age), City sewer

    Background, May or may not be relevant:

    About 7 weeks ago There was a water main break and while repairing the city "accidentally tapped into the sewer line" collapsing the sewer (collapsed sewer was repaired). This water main/sewer area is located about 75 feet south of our property (sanitary sewer runs north past our house). Our lateral is the only one that empties into about an 8 inch sanitary sewer line between the area where the collapse occurred and the next manhole which is located 10 feet north of our lateral outlet.

    Issue:
    Our problem started about 5 weeks ago. Took a shower on main level then was running the wash machine on basement level, heard a violent boiling/bubbling noise coming from the basement toilet. Found the laundry room flooded from the basement floor drain. The water did go back down the drain within minutes.

    Attempted Solution:
    Rotor Rooter attempted to open lateral line. They were able to feed their snakes/augers through over 100 feet without any resistance but the drain was still backing up. 6 hours and a very large bill later, after several people attempting to manually open the drain, they jetted it out. They claimed to be "200 feet out" by the time they were able to clear the line. The distance of our lateral to the sewer should be about 70 feet. At any rate, the drain stayed clear until a few days ago. Used water normally, showers, dishwasher, laundry without any issues.

    Issue #2:
    A few days ago, Again after a long shower on main level, then doing laundry, the infamous toilet "boiling" then the flooding from the basement floor drain. Called the city and they again claimed that it wasn't an issue with their sewer and it must be a problem with our lateral. However, they did come out and jet out the sanitary sewer lines both north and south of our lateral outlet just in case (I had asked if it was possible that debris had entered sewer during collapse). Had been cautiously using water since then for past few days, a shower a day, dishwasher, a load of laundry all spaced out. Then tonight, after draining a full tub of water from main level tub no issue but as soon as starting the laundry right afterwards, here we go again.

    Suggestions:
    Could this be an issue with the venting that goes out to the roof? All the snow/ice has melted now so if it is a venting issue it wouldn't be due to ice or snow. If it was a venting issue, if both clean out caps are removed should that create an alternative vent in the system and allow water to drain freely? Rotor rooter suggests putting a camera into the lateral. If they were able to easily go through the lateral, how likely would it be that the integrity of a PVC pipe would be causing the issue?

    I really appreciate any insight anybody may have to offer. I have learned more about plumbing in the past couple of months than I had ever imagined I would have but I really need some expert insight on this issue.

  2. #2
    TROJAN WORLDWIDE SALES RP MACPLUMB 777's Avatar
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    No this is "not" a venting problem !
    It is a sewer problem and the first thing is to get a camera down the line and see what damage the city caused to yours or their pipe
    and then have the city pay first to solve problems then to reimburse
    you for what you have already payed out !

    MACPLUMB 777

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    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


     



  3. #3
    DIY Junior Member sm2327's Avatar
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    Camera inspection of our lateral scheduled for tomorrow. They will do the inspection first and then jet out the line if needed to complete the inspection. We will keep a copy of the video.

  4. #4
    DIY Junior Member sm2327's Avatar
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    Turns out city placed a cast iron stub off the main sewer line when it was created. Our house was built well after the road and sewer were laid. Our PVC lateral connects to the cast iron stub that was originally placed. The cast iron is worn, rusted and corroded. Also, the PVC/cast iron connection is misaligned creating a catch for stuff to build up. The entire area where the issue lies is along the public right of way, but the city won't pay for anything beyond the main sewer line regardless if it's in the public right of way or not. Not the best news.

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