On models with 4" main frame standard, you must also purchase the separate upgrade to 6" Main Frame. This Water and Sinks Package includes: Base cabinet with 2 doors, stainless triple dish wash sinks, separate stainless single hand wash sink, fresh water and brown water holding tanks, electric water heater, water pump, dedicated 110V outlet, city fill and waste outlets. (If desired, 110V electrical service must be purchased separately.)