30 GALLON TANK - RV waste water holding tank MADE IN THE USA - Waste water, black water, gray water tanks are NOT FOR FRESH OR DRINKING WATER USE - Perfect for motorhomes, trailers, tiny houses ...

locate the drain valve or low-point drains (check your RV manual for specifics) and empty the water completely. If you’re at a dump station, you can also empty your gray and black water tank ...