Anyone have a good remedy beside digging up and replacing line?

Scope it and dig up a small section and just replace that would be a little better. I have oak trees all around our place and after two digs for that issue, We ended up replacing everything with such 40 or 80 pipe instead of that thin drain line.

I recall using copper sulfate crystals on an old-style septic system years ago to dissolve the roots.

They did the trick.

Copper Sulfate Root Destroyer

Fyi, unless you already know where the roots are and the are on "your" side, call the city and have them check. Ours were close enough to to sidewalk easement that they did all the work and replaced the grass.

You can clean it out with a chain rotary head on a heavy duty drain auger or a rear facing power washer head. Once cleaned, have it scoped and find the break/crack. They can pinpoint the location for you doing that so you can dig exactly there and replace the section needed.

Controlling a tree's roots in a septic tank can be a never-ending effort until the tree is removed. You can use the following methods to cut the tree roots.

- For every 300 gallons of water in the septic tank, flush 2 pounds of granular copper sulfate down the toilet. Copper sulfate kills and dissolves tree roots as they absorb the tank's water.

But remember that because copper sulfate is corrosive, thin metal pipes or drains shouldn't be utilized with it.

- With an expert in septic systems, pump the water from the septic tank. Use a plumber's snake to remove the tree roots that clog the drain lines and the tank after it has been pumped.

I'll also suggest cleaning the septic system with a professional gutter cleaning expert every three to five years.