Back in Jan we had a main line clog, we replaced all the pipes under the house which fixed it until now (3/14/14) Our toilet bubbled yesterday and sometime we hear gurgles Today my husband woke up used the bathroom and the toilet will not flush he tried plunging it and nothing happens we ran water in the bathroom sink and the water in the bowl didn't move we ran the shower and nothing happened either. SO is it another main line clog or is it a vent drain thingy.