The RM sealock toilet, which can be installed below and above the waterline, is the logical successor of the RM standard toilet, for many years well known all over the world. The in- and outlet of the RM SEALOCK toilet can, contrary to other marine toilets, completely locked, if the toilet is not being used. This gives extra security against incoming water, especially when the toilet is installed below the waterline. The sealock toilet is supplied with a self priming handpump which, depending of the space available, can be installed at the right or left side of the bowl. The sealock toilet can be supplied with standard or household type porcelain bowl and white plastic or wooden seat and cover. All parts are made of corrosion resistant materials.