Syphon Breaker Kits: This kit must be installed in order to prevent the syphoning effect from damaging the engine. This means that if the engine is under the waterline, it is exposed to water entering into the exhaust system and subsequently into the engine itself. To prevent this from happening, the syphon breaker kit will have to be installed above the waterline, letting air enter the hose and liberating the engine from the syphon effect.1 meter hose included.