...also, I have tried fixing as if an air lock (i.e. holding my thumb over the outlet for as long as I can manage and then quickly removing). This made no difference.
Hi. Hope it's ok to post this here.
I have an outside tap at the back of the house. It's always worked fine until this spring (it's not used over the winter).
It comes out from our utility room. In there is a sink and toilet, both of which work fine. As far as I can see, the pipe comes off...