Old septic drain line questions

[red hott farmer]

We have our kitchen drain line gurgling up from the vent. / also a real wet spot in the yard near the septic tank. We bbought our our house 3 years ago. The house was built in 1890 and the septic tank is made out of brick and concrete Straight down I saw it wneh we pumped it 1 year ago. The kitchen drian outside is 2" PVC going into 6" concrete Pipe the pipe sections are 24 's long and bigger on one end. where the next pipe fits in. They have done work on the line "in the current age. There are some PVC connections onto the 6 " concrete sections with Concrete around them to hold them together. A couple of the 6" concrete pipes where they come together are seeping sewage out . which is causing the wet yard. where the 2" pipe comes into the 6" pipe it is also seeled with concrete all around it. I snaked the 2" pipe out all the way tonight and got lots and lots of white grease out. of it.
so should i replace the leaking concrete with rubber sleeves and PVC ?
we are easy on our septic tank. Only toilet goes in it look like. we shower outside and our washer we recycle that water for the trees. I thought the kitchen went to the tank but it does not. Should i replace the concrete i exposed with PVC? I plan in retiring here. for the next 50 years.

[Danaus29]

IMO, the whole line should be replaced and burried at the proper depth. We had a line like that, got crushed in one spot, came apart in other spots. It was a huge mess to fix but fortunately we had only a 30 foot run.

[Ken Scharabok]

Do you know if the kitchen sink line end is? If the pipe joints were sealed it sounds to me like it was intended as a transit line to where the water came out the end, perhaps into a ditch or low area. If that end has now become clogged it may well back up contents until they seeped out through any broken/deteriorated joints.

If there is an area to which the sink water can be drained, and the natural lay of the land is in that direction, solution may be as simple as renting a trencher and redirecting the 2" PVC to 2" black plastic. At the end you might let run on the surface or create a drain area. For example, at the end you dig a hole several feet deep, backfill it with rocks and then the drainline empties into it - name for this escapes me at the moment - dry sink?

May also be possible to put such drain area near the house.

Another possible solution with the trencher if your soil will perculate (e.g., not gummy clay). As soon as possible after the trench is dug force down (via feet) sections of 4" perforated black plastic drain line to the bottom of the trench. Run 2" PVC into the line and backfill over them.

[red hott farmer]

I have black sandy loam. the line is only 10" deep. I will dig more today to see how far the 6"concrete pipe goes.

thanks for the replys so far.

we have trees all thru the yard to contend with Huge Pecan trees and Chinese chesnut trees.

[Ken Scharabok]

You don't need to dig. Make a probe, such as a cross handle on a 3/8" rod. Start at the known end and just follow the pipe through probing about every two feet or so until you find the end. After the first couple of hits (would will hit something solid), you will see the direction it is going.

With that depth and soil you may be able to just dig up the old line and replace it with 4" perforated black pipe. However, tree roots sound like they would be a problem with that solution.

[Danaus29]

Would it be possible, easier, to rerun the kitchen line so it goes into the septic tank also?