230 Mike wrote:
The one risk with the "blue cap" method is that if you don't get the cap back on TIGHT with a good airtight seal, the system will suck air instead of, or in addition to, water. That's why it has a hex head, so you can put a wrench on it.
Furthermore Mike,
That's why I chopped it off, fitted a ball valve and a Gardena type garden hose male quick release coupling and a blanking cap ! Foolproof, I can even ask our Working Cocker Spaniel to connect it up (he won't for some reason, bone idle, never done a working day in his life !)