Newbie with water/pump? problem
Welcome to the Forums and the world of Vintage Airstream ownership!
The fresh water pump that you likely have if it is the OEM unit is a PAR or Peters and Russell. These pumps are not common in the RV industry and Airstream is the only RV manufacturer that used them as original equipment consistently. These pumps can be rebuilt with modest effort and expense. The rebuild kits can be ordered from online suppliers or in many cases can be purchased from the parts department of a power boat dealer. I have had far better luck with the PAR pumps than any of those typically used by RV manufacturers . . . my Minuet still has its original pump and it has been rebuilt once while I have owned the coach (2005 to present). I suspect that the pump is either drawing air due to a leak in the diaphragm or a leak in the suction side of the hose that links the pump to the water tank.
Good luck with your investigation!
Kevin D. Allen
WBCCI (Lifetime Member)/VAC/Free Wheelers #6359
1964 Overlander International/1999 GMC K2500 Suburban (7400 VORTEC/4.11 Differentials)
1978 Argosy Minuet 6.0 Metre/1975 Cadillac Eldorado Convertible (8.2 Liter V8/2.70 Final Drive)