| Gray and Black Holding Tanks | All trailers that are RVIA are equipped with a gray holding tank. If a toilet is in the trailer then a black tank is also required. These tanks hold the waste water from the sinks, shower and toilet. Waste tanks are generally 23 to 27 gallons in an Outlaw Conversion and 15 to 19 gallons in a Trails West. An upgrade option is to add auto dumps which makes dumping your tanks a little less messy. |