Utility toilet support flows. told to enjoy a belly on the primary pipe. what is the best solution? UTILITY TOILET IS ON THE SAME SIDE OF THE HOUSE WITH THE...

UTILITY TOILET IS ON THE SAME SIDE OF THE HOUSE WITH THE KITCHEN SINK AND WASHER AND DRYER.THE TOILET GURGLES WHEN THE WASHER OR THE KITCHEN SINK IS BEING USED. SOMETIMES IT BACK FLOWS WITH THE WASHER. TOLD TO HAVE A BELLY IN THE MAIN PIPE. WHAT WOULD BE TO BEST AND CHEAPEST SOLUTION? THANKS EVERYBODY.
Classic symptoms here.

Your mainline is stopped up. Have your chief sewer line rootered <snaked> before anything else. i seriously doubt if nearby is a belly in the pipe unless this occurs next to some frequency.

If your rooter company tells you the stoppage is under the house, possibly the pipe has a belly, otherwise his snake "MAY" bring back roots from a adjacent tree.

Having your mainline "snaked" is the cheapest and fastest "first step".


Seems like you have comparatively a problem, only way to bring rid off this belly is to dig older line out and replace that section near new line.
That's errand for plumbing company, get several quotes to make sure that you will take it done at reasonable price, or you can deal next to it for a while, but it will only get worse.
One more item, I'm assuming who ever told you that there is belly, actually used camera to see it and save, have that done, it's not cheap but much, much, cheaper than dig out sewer stripe, when it could be really good snaked or jetted, and that can be determined with camera.
Answers:    no cheap solution,u need to break open the walls n possibly ceiling and seperate the lines feed these outlets n possibly add another wet or dry vent pipe contained by the system.sorry.