GROCO 2-Inch Bronze Engine Flush Kit and Adaptor

The GROCO 2-inch engine flush kit adds a quarter-turn service connection to a compatible seacock, creating a convenient access point for engine cooling-system flushing, winterization, and emergency bilge pumping. The quick-release plug can be removed when service is needed without dismantling the normal raw-water plumbing.

For winterization, the included service adaptor gives a connection for introducing antifreeze into the cooling circuit after the seacock is closed. In an emergency, the connection can also allow the running engine's raw-water pump to draw bilge water and discharge it overboard, provided the system is installed and operated according to GROCO instructions.

Confirm seacock size, hose arrangement, engine raw-water requirements, access, and installation orientation before fitting the kit. Always close or open the seacock in the correct sequence for the intended procedure, secure the quick-release plug after service, and test the system for leaks before returning the engine to normal operation. See our other marine plumbing.

• The quick-release connection simplifies flushing and winterization access.
• The service adaptor gives a practical winterization connection.
• A compatible engine raw-water pump can assist with dewatering when the system is configured correctly.
• The quarter-turn plug restores the standard flow path after service.