I have two bathrooms, one on each end of the house. In the last couple of days when we flush the toilet in one bath you hear the gurgle in the other toilet (this is true both ways). In the bathroom with the oldest toilet (1986) it is now getting slower to flush and fill. Then it doesn't completely fill back up. It has been raining steadily for over24 hours. Does this create the problem? We have had the septic tank emptied so it is not a full septic tank. My email address is jkmckinnon@bellsouth.net