Fresh Water
Fresh water is stored in a tank and delivered by a 12V pump to the sink (and sometimes shower). Tank size varies (e.g. 40–100 L). Fill only from potable sources — see drinking water. Keep the tank and hoses clean; drain and flush periodically. In cold areas, prevent freezing (insulate or drain if leaving the van).
Grey Water
Grey water (sink and shower waste) must be contained in a tank if you’re self-contained — never dump it on the ground. Empty at dump stations only. Tank size is part of the self-containment standard (NZS 5465). Use biodegradable soap to reduce odours and make disposal easier.
Pumps and Taps
A submersible or inline pump runs when you open a tap (pressure switch). Ensure the pump is wired to the leisure battery, not the starter battery. Leaks waste water and can damage the van; fix drips promptly. In winter, protect external pipes and the pump from frost.