Thanks,it does both. Sometimes it gulps and it seems like its having a hard time getting down the drain.
Is the only access to vent from the roof down?
My utility sink next to washer drains real slow then seems to pick up speed as it drains for about a minute. Is there any meaning to this?
I've poured draino down but didn't do anything.
Thought I'd check here before I call the plumber out.
Thanks