Why is water leaking from the pump?

Probable causes include worn water seals, a hairline crack in the pump body or cross-threaded fittings/valves. All of these conditions require disassembly of the pump and manifold. If your unit is under warranty, take it into the nearest service center for repair. If it is not under warranty, you should take it into the nearest service center or call Campbell Hausfeld Technical Support at (800) 543-6400.