inteliPlug ProX Captive Drain Plug Upgrade Transom drain plug reimagined and engineered it to be easy to use and impossible to lose. inteliPlug ProX captive drain plug & garboard assembly Dimensions ProX comes with a hermetically sealed aeronautical grade sensor with Deutsch plug pigtail These have a triangular ergonomic cap so there are no tools required to tighten or loosen the plug The spring- loaded cap is captive (stays attached) Modified NPT threads form a primary seal combined with the tension of the integrated O-ring for a secondary seal Engineered transom gasket, no messy silicone needed Approved for all marine environments including salt water A direct replacement for the bronze and stainless traditional style garboards Large opening in garboard assembly for easy flow/drain Manufactured from glass fiber reinforced ABS to increase strength and flexibility. Increases fatigue endurance, resistance to high and low temperatures and resistance to abrasion 2" outer diameter - fits in the same spot as your current garboard drain plug Boating Industry TOP Product for 2020