I had similar problems the first year of ownership. The sanitary tank flushing check valve was installed backwards and the water service panel consistantly dripped even after dealership repairs. I removed the panel and quickly found loose fittings that were leaking. While the panel was off,I relocated the pump in a more accessible location for service which was needed last summer when the pump stopped working. Replacement was about a 10 minute task.
Also found that the city water feed line from the panels ball valve was too long during factory assembly resulting in a kinked sharp bend that restricted water flow. Repositioning and using plastic ties kept the line straighter and kink free. Water pressure and flow is much better now.
2003 34' Dolphin 5342, W22, UP, UPGBrake, F and R Track Bars, Rear IPD sway bar, Koni FSDs, Safe-T-Plus, Scan Gauge II.. 2004 Jeep Liberty, Blue-Ox Adventa..