Before you pick up the van, Siesta Campers staff will make sure that you have an empty waste water tank. If during the trip you noticed the waste water tank is full, follow the next steps:
Note: In your Beach model, it is not possible to see the water level in the tank. If you have to fill the clean water tank, empty the waste one.
Your Beach is equipped with a 40L clean water tank and 21L waste water tank underneath the van.
To empty the waste water tank, find the lever located underneath the sliding door. Open by rotating or dragging out the lever and empty the contents of the waste water tank (see the photos below).
To dump, find specific places to do so such as gas stations, campsites or street drains. Never dump the contents of the tank in non-specific places like nature.
Other relevant articles:
How to refill the clean water tank