[tentcamper]

I think the big use of water is the dishes and shower. We use to fill the gray tank very fast on our first camper. The camper did not have a gauge and I would hear the drain is slow or water is coming up in the tub.

We know have a method that we almost use no water to do the dishes, using about a gallon. If the CG has a nice shower we use the CG shower.

Also, The indicator is a little misleading. The tank sensors come on when the water level reaches the sensor, which is about the 3/4 level. Most of the time we still have room in the gray tank after 3 nights/days, but the gauge may say were full.