Dometic RV toilets are one of the most popular RV toilet brands, and will last you for years if installed properly.  If you are replacing a dometic RV toilet for another Dometic one then the process is really simple. Even if you are installing a Dometic toilet for the first time, it's straightforward. Follow these simple steps: 1. Turn off the water supply to the toilet. 2. Remove and drain the water supply line, this is the clean water going into your RV toilet. 3. Remove the bolts holding the toilet in place (you’ll need a spanner for this), once the bolts are removed you can remove the old toilet from the RV. 4. Replace the old toilet floor flange seal with a new one, make sure that there is enough room for your new Dometic toilet at this point. The space needed is usually 10 inches from the wall to the centre of the floor flange seal. 5. Make sure that the new floor flange seal is clean and has no debris or sealant on it. 6. Insert the two supplied T bolts into the slots on the floor flange. 7. Check that the seal is installed correctly on the base of the toilet so it can create a watertight seal with the floor flange. 8. Now carefully place the new Dometic RV toilet over the floor flange making sure that the T bolts are aligned and got through the holes on the toilet base. 9. Note that the toilet base will not be completely on the floor at this point. 10. Install the floor mounting nuts and washers to the T bolt and carefully tighten *DO NOT OVER TIGHTEN THESE* Alternate between the sides when tightening to prevent the toilet from being uneven. 11. When tight the toilet should be sitting perfectly on the RV floor, you can then put the bolt covers on. 12. Connect the water supply line and turn the water back on. 13. Flush the toilet a few times and check for any leaks.