Hi,
I just noticed that when my washing machine on the spin cycle it causes the water level in my toilet to drop and make a sucking sound. I haven't noticed any odors or slow drains around the house. Is this normal? Is this related to my home's septic system? Or is it just because my girlfriend moved in a couple of weeks ago?
Any help is much appreciated.
Thanks
Alex

You probably got a vent clogged or you need to rooter your drain line

Hello Thomas and Caro

You posted your problem on a 10 years old post please open a your own new post for more visibility, also always check the date on the left top corner of the post, Thank

John