Oh, it just gets better. I took the pump and the tube and the connector I have to the aquarium/pond store here and the girl behind the counter tells me they don't have anything that will work and then she picks up what I have and just screws it together! AND, I can't pull it apart?? I couldn't believe it, plus it was a little funny and a lot embarrassing. I came home and told Mimi not to touch it because it would never go back together again. Well, she proceeds to show me that it is not on straight which I suppose is why it is staying on. I don't care anymore, if it holds when we put it on catty wompas then that's how it goes. I still think it is a big rip off by plumbers and pvc manufacturers to make it more confusing than it warrants. Oh, and while we are on metric for everything, pvc comes in inches... whatever.