Jabsco Manual Marine Toilet - Regular Bowl. Popular worldwide for more than two decades Jabscos sturdy manual toilet ensures peace of mind thanks to the intuitive simple to use Twist n Lock feature. It provides protection against siphonic flooding and waste backflow with one easy 90 turn of a handle. Specifications for Jabsco Manual Marine Toilet: Manufacturer: Jabsco Color: White Package Contents: Jabsco Manual Marine Toilet Jabsco 29120-5000: Manual Marine Toilet - Regular Bowl