Septic line HELP!!! Large issue no plumbers can figure out!

Help Support Plumbing Forums:

JonB.

New Member
Joined
Jan 16, 2022
Messages
3
Reaction score
0
Location
Syracuse, NY
I've been having septic line backup issues. Had my main line to the tank snaked, had to go from the basement out, snake made it to the p trap outside by the tank. Few days later the water backed up again. We camera'd the line both times, little grease from previous owner but nothing horrible. These guys just wanted to get out of here, drained the line into buckets, made a mess, ran a plunger attached to conduit down the line and left after running the camera. The pitch isnt the best, the line is under my deck and I imagine the deck settled pushing the line down a little over time. I'm going to remove the cast iron line and replace it with schedule 40 pvc. I seem to have a lot of backups because of this p trap. Mainly when we use the shower and then run laundry. Would the line not be able to handle all of that water? It's a 4" out to the tank and 3" lines feeding it. The previous owner put a small tap into one of the lines with a hose fitting (I assume to bleed off some water when it backs up but that's just a guess. Either way that tells me they likely had the same issues).

My main question is (when i change out the main line and repitch it) should I put in a p trap by the tank like there currently is or can I get rid of it all together? I want to put on a 45 clean out so i can get a snake in from the outside and jet periodically as well. Do i need to vent my tank directly if i remove the p trap? Are there problems with removing my exterior p trap if I do vent the tank directly?

All of my interior drains have p traps (at least everything I can see, aside from tub, shower), that rigged up tap in to the line is a place gases could escape into the basement. Should I cut out a small section of the 3" line there and add an access point/discharge instead of this shotty tap in?

Hopefully I've come to the right place. The local guys havent been knowledgable and say things that go against common sense. Any assistance and expertise is appreciated. Thanks, Jon.
 

GReynolds929

Professional
Professional
Joined
Jun 16, 2018
Messages
340
Reaction score
219
Location
WA
Has the tank been checked? When the last time it was pumped? There should not be a trap outside the house.
 

RS

Well-Known Member
Joined
Dec 25, 2019
Messages
404
Reaction score
138
Location
USA
I have never seen a trap outside the house either!
 

JonB.

New Member
Joined
Jan 16, 2022
Messages
3
Reaction score
0
Location
Syracuse, NY
Has the tank been checked? When the last time it was pumped? There should not be a trap outside the house.
Thanks for the response, I checked the tank when this started and again yesterday when it happened again, tank is not even close to full. Plunged from the trap to the tank and that is clear.
 

Geofd

Moderator
Staff member
Professional
Joined
Jan 20, 2018
Messages
3,464
Reaction score
750
Location
Boston, Massachusetts
P traps or house traps were used a LONG time ago when things weren't properly trapped to prevent sewer gasses for m coming back thru the fixtures, we had a couple at work and the same thing happened, now they are gone and so are the stoppages
 

JonB.

New Member
Joined
Jan 16, 2022
Messages
3
Reaction score
0
Location
Syracuse, NY
P traps or house traps were used a LONG time ago when things weren't properly trapped to prevent sewer gasses for m coming back thru the fixtures, we had a couple at work and the same thing happened, now they are gone and so are the stoppages
Thanks for the info! My house was built in 1988 and I have a concrete septic tank. I'm leaning towards removing the p trap and just putting in a 45 so I can easily snake/jet the line.

Is it common practice to vent the tank itself or is not fully capping the 45 enough of a "vent" (if needed at all).
 

Twowaxhack

Professional
Professional
Joined
Feb 9, 2021
Messages
7,521
Reaction score
3,262
Location
United states
Thanks for the info! My house was built in 1988 and I have a concrete septic tank. I'm leaning towards removing the p trap and just putting in a 45 so I can easily snake/jet the line.

Is it common practice to vent the tank itself or is not fully capping the 45 enough of a "vent" (if needed at all).
Remove the trap and plug the cleanout.

Your house should have vents through the roof.
 

MrInfoPhilly

Professional
Professional
Joined
Jan 15, 2022
Messages
120
Reaction score
27
Location
Earth
Thanks for the info! My house was built in 1988 and I have a concrete septic tank. I'm leaning towards removing the p trap and just putting in a 45 so I can easily snake/jet the line.

Is it common practice to vent the tank itself or is not fully capping the 45 enough of a "vent" (if needed at all).
Philadelphia has curb traps with cleanouts., old skool., well known problem for causing blockage.... eliminate it.,

And convert it to a cleanout while you're their.

You individual fixtures are trapped so no need for a house / curb traps

In my opinion.
 

MrInfoPhilly

Professional
Professional
Joined
Jan 15, 2022
Messages
120
Reaction score
27
Location
Earth
Thanks for the info! My house was built in 1988 and I have a concrete septic tank. I'm leaning towards removing the p trap and just putting in a 45 so I can easily snake/jet the line.

Is it common practice to vent the tank itself or is not fully capping the 45 enough of a "vent" (if needed at all).
Philadelphia has curb traps with cleanouts., old skool., well known problem for causing blockage.... eliminate it.,

And convert it to a cleanout while you're their.

You individual fixtures are trapped so no need for a house / curb traps

In my opinion
 
Top