Clean and deodorize RV fresh water systems with this safe biodegradable formula. Dewinterize fresh water tank and lines. Good for periodic cleaning freshening and deodorizing. One step no-measure solution requires no mixing or preparation. One gallon cleans up to a 100 gallon tank. Features . No mixing or preparation. Cleans and deodorizes. Dewinterize fresh water tank and lines. One gallon cleans up to 100 gallon tank. Safe for RV and marine applications. Capacity - 1 gal.