Septic System Backup Questions

   / Septic System Backup Questions #1  

Beltzington

Platinum Member
Joined
Oct 4, 2008
Messages
954
Location
Appling, Georgia
Tractor
JD 3720
Been having allot of plumbing problems lately and yesterday I am afraid I found a major one. I'm going to have the septic tank pumped tomorrow but I am wondering if it could be something more serious and what you would check.

The 25 year old house is new to me so I do not know when the tank was last serviced, what I do know was a new leaching field was installed about 8-years ago and the house sat empty for the last 6 months. When I bought the house I filled all the sinks and tub and they drained quickly I have also been flushing the toilet several times during the day on the assumption the tank may have dried because of being unused for so long and I wanted it ready to be pumped. I am renovating the master bath and bedroom and was doing one last leak test before the new sheetrock is installed which basically consisted of running the bathtub hot and cold faucets wide open for about 5-minutes ~15 gallons/minute.

The tub was draining really well but began filling up because the input was exceeding the output, my wife was in the master bath looking for leaks and begin yelling to turn off the water which I did. Going to see what she was yelling about I found the 4" main sewage line had backed up and water was flooding over the floor from the toilet flange, going back to the hallway bathroom I found water also coming from under the toilet. The kicker and what I can't understand is the tub was still draining very quickly, I assume it is possible to overwhelm a septic system but I have never seen it before. If the tank was full or there is blockage in the sewer line or leaching field it would have not continued to drain would it? I am afraid simply pumping the tank will only be a temporary solution to a more systemic problem and I certainly don't want to sheetrock and tile a bathroom only to have it ruined in a few weeks or months.

Appreciate any ideas you have.
 
   / Septic System Backup Questions #2  
Could there be a second system for grey water and one for waste? if so it could just be a blockage in the sewer line section?
 
   / Septic System Backup Questions
  • Thread Starter
#3  
No both dump into the same sewage line. Both baths connect to a straight 4" Schedule 40 PVC drain line only about 30 feet from the septic tank so the water doesn't have to far to flow before it should run into the tank.
 
   / Septic System Backup Questions #4  
After they pump tomorrow you will know it was full or not. But you might study on Septic tank health. The bacteria that you need to start in the tank when it is new and how to not kill it. Bleach is a quick way to kill the tank. You might want to check what you are dumping down the drain . Dont want to take this talk to far but when the lid comes off of that tank it should have a slow bubbling action going on. Perking if you will. If you kill or do not start that bacteria it will just be a holding tank until it gets full. They sell stuff at the store called Rid X and I am sure many others, I have flushed bread yeast off and on through the year. Kind of like making beer.http://www.rid-x.com/products/?gclid=Cj0KEQjwqfvABRC6gJ3T_4mwspoBEiQAyoQPkd89iW2LVKJ47aMPvFYJpVbaY3cA4Mq_Wlvn97aNiEYaAq0A8P8HAQ&gclsrc=aw.ds
 
   / Septic System Backup Questions #5  
Sorry to hear that. Is the ground wet enough/water table high enough that the leach field might be saturated? After you pump the tank you might consider installing an outside cleanout that would allow you to snake between the house and tank and keep the mess outside if the system gets overwhelmed again.
 
   / Septic System Backup Questions
  • Thread Starter
#6  
I just got back from the house and with fans running all night everything is nice and dry again. While looking to see how hard it would be run a snake from the master bath into the septic tank I stumbled on what could have caused the whole problem. When I removed the toilet from the master bath I stuck on old tee-shirt in the toilet flange to keep trash out of the system. Yesterday when the water was pouring onto the floor I noticed the tee-shirt was missing but assumed my wife had removed it while trying to stop the water, nope, guess what I found at the very bottom of the pipe. It could be coincidence and it was just sucked down when the water receded but if not it would explain what happened. I will need to wait on my wife to get back from church to test it but wish me luck, I will take embarrassed over an expensive repair bill any day.
 
   / Septic System Backup Questions #7  
I just got back from the house and with fans running all night everything is nice and dry again. While looking to see how hard it would be run a snake from the master bath into the septic tank I stumbled on what could have caused the whole problem. When I removed the toilet from the master bath I stuck on old tee-shirt in the toilet flange to keep trash out of the system. Yesterday when the water was pouring onto the floor I noticed the tee-shirt was missing but assumed my wife had removed it while trying to stop the water, nope, guess what I found at the very bottom of the pipe. It could be coincidence and it was just sucked down when the water receded but if not it would explain what happened. I will need to wait on my wife to get back from church to test it but wish me luck, I will take embarrassed over an expensive repair bill any day.

Sounds like you've found the culprit...hope that's it...the only other simple things to check along with clean outs is the vent stacks...
 
   / Septic System Backup Questions
  • Thread Starter
#8  
Sounds like you've found the culprit...hope that's it...the only other simple things to check along with clean outs is the vent stacks...

Good suggestion, I hadn't considered a clogged vent but that could certainly cause erratic draining like I saw.
 
   / Septic System Backup Questions #9  
maybe you found your problem. Septic systems can and will fail. The problem isn't with the tank. More times than not, it's with the field lines running from the tank. Fill lines can collapse, and or fill with solids that should have settled to the bottom of your tank.some old field lines used concrete pipe and even terracota pipe. over time these deteriorate. Grease in a septic system is a no no as well. Not really a good idea to have dish washers ,or washine machines connected to a septic system, but not much other place to drain them... Good luck
 
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   / Septic System Backup Questions #10  
I say it's just a build up of solids at baffle of tank. You would know if you have venting issues from other things happening. If you can get to the inlet cleanout on your tank use a stick to move solids away from baffle.
 

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