Bubbling coming up from the toilet when the laundry water drains
I have an old house with a septic tank. Lately we have noticed bubbling coming up from the toilet and a slow drain of the toilet when the laundry water is draining into the laundry sink. Also, we notice gurgling coming from both the bath tub and from the kitchen sink. We have snaked the toilet with a six foot auger and it was totally clear. I also climbed onto the roof and ran a hose down the vent and ran the water in it for a while, and it seemed clear as well. Any suggestions would be appreciated. Thanks.