Johnson automatic submersible bilge pumps.
They are activated by themselves in the presence of bilge water. Height only 72 mm ... The submersible pumps are capable of carrying out most of the applications of bilge pumps. Long pump life is guaranteed by heavy-duty motors with stainless steel shaft (SS2343) and resistant thermoplastic bodies. If the automatic switch is installed, the pump starts when there is water in the bilge and switches off when it is empty. Submersible bilge pumps are not self-priming and must be installed in the lower part of the bilge.