Sealand 302751001 Traveler 510 Plus White Toilet with Spray Efficient effective rim flush action uses about a pint (.5 liter) of fresh water per flush from on-board demand system. Integral anti-siphon vacuum breaker protects potable water supply. Requires no electricity Fresh, clean operation means there are none of the nasty odors common to saltwater flushing toilets. Our exclusive self-cleaning flush ball with seal locks out holding tank odors Measures 18-3/4 inch in back height Measures 17-1/8 inch in front height Measures 20-1/2 inch in depth