Rob the Tiff

Thanks for the reply, the rush of air seems to go into the waste pipe when I move it a bit. where would this aav be? Would it be under the floor?

Hi everyone, thanks for reading my post. I've been in my bungalow for a few weeks now and all of a sudden the toilet wouldn't drain, or should I say it drains very slowly, but the flush is good. Now when I move the waste pipe at the back a bit, I hear a rush of air and hey presto it drains, then I push the waste pipe firmly on again then flush again and it fills up and doesn't drain. Is this a vent issue? By the way the toilet is in the middle of the bungalow and there is no vent pipe I can see either on the outside of the bungalow or anywhere on the roof. Any advice?