Van has integral pump socket and pressure switch. New pump. Water flow excellent in toilet compartment, both hot and cold, but virtually nothing at main sink, from either hot or cold. Suspect pressure switch, but welcome suggestions!
If ok in toilet area I'd think pressure switch is fine. I would look at the little mesh screen at the end of the tap, (usually unscrews) as they often trap bits of crud and gradually restrict the flow.
Dave.
------------- Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.
Edit - the filter on the end of the tap was blocked, (didn't know there was one fitted) currently soaking in hot bicarb solution, but the tap is working fine.