Dometic/Sealand 511H 4 bolt pattern traveler toilet without hand spray comes in white. This toilet features an improved rim wash, a deeper bowl, increased seat height, and a household-sized seat for maximum comfort. Low profile height 13.75". Note: This RV toilets use a 4 bolt floor flange. If you intend on using the 510+ or 511H toilet to replace a Thetford toilet with a 2 bolt floor flange, you will need to purchase a flange adapter. If you need help with what parts or toilet you need please call Environmental Marine at (1-800-522-2656).