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Hi there please can anyone tell me what i'm doing wrong.

When we turn the water pump on it won't turn off again , now i know about the pressure switch thingy that has to be turned slightly but we either end up with a constant clicking for about 10 - 20 secs before if turns off (very annoying) or the thing just wont turn off.

We are turning the screw quite literally only 1 millimeter at a time so why can't we find a middle point.

I've checked the swift handbook but it doesn't come up with anything new to try.

Any ideas will be a great help.    

With a pressure operated system if you are running the water slowly you will get a clicking as the pump goes on and off, but this should only be while the water is actually running.  Do you mean your pump runs on for 10-20 seconds, clicking, after you turn off the tap?

On ours, if it is turned too low the flow of water is very poor, but we have not had the pump running on as you seem to have had.

Are you adjusting while on hook up, or just on battery?  The setting usually needs to be altered depending on which you are on.

I had a similar problem a couple of weeks ago, and it turned out to be a small piece of plastic that had broken off the inlet end of the pump and was sucked in.  It got stuck at the diaphram on the pressure switch, preventing the flow of water being completely cut off.  I found a series of photos that helped on Wizards website, showing exactly how to dismantle and reassemble the pressure switch, and it worked perfectly after I had removed the offending piece of plastic (about the size of a pin head!)  Click the link below......and I hope this helps.

http://hp-h.com/p/wizard41/Whalepump.html

may help

Thanks everyone for all your help.

We tried the methods suggested but still couldn't get it to work so we have had to take it into the workshop. It turns out that where you plug the whale pump into the outside of the van - the non return valve was broken and it was letting air in so therefore had to be replaced. No amount of fiddling would cure it. Just so that anyone else with this problem is aware.

We took it to a place in Chesterfield (Derbyshire) where they did it straight away for us and only charged £20 so if you live this way it might be worth checking out (and they service vans for £106 + vat ) seems reasonable.