[dbyeager]

What does it mean when you hear one toilet gurgle when another toilet in the house is flushed?

[biggsie]

I believe you have a venting problem -- most of the time the stack vents pressure

To outside -- when water goes down one toilet it forces air out of the line and in your

Case it takes the path of lease resistance -- bubbling out in other toilet because of

A plugged vent... Birds build nests in vents and gutter downspouts -- need a

Properly cover... Best way is to snake drain is down the vent pipe to clear it

Please rate my answer

[ballengerb1]

Biggsie is correct about snaking the vent. Do it from the roof if its safe up there. Run enough snake to reach roof top to basement floor plus 10-15 ft more. The gurgle is the air venting itself out your other toilet because it can vent up the blocked stack. Once you have rodded the vent install a Provent or roof vent cap to cut down on future blockages.