The GROCO 2 in engine flush kit fits compatible 2 in seacocks on larger inboard engines. It adds a quarter-turn access port to the seacock for cooling system service. The bronze kit includes the service adaptor needed for winterizing.
Close the seacock, pull the quick-release plug, and attach the adaptor to bring in fresh water or antifreeze. When the work is done, the plug goes back in and the engine draws through the seacock as usual. That makes routine flushing a quick job instead of a plumbing project.
If installed and operated per GROCO’s directions, the port can also let the engine’s raw water pump help dewater the bilge in an emergency. Check your seacock size, engine raw water needs, and access before fitting the kit. Browse more Marine Plumbing for other GROCO products.
Key Features
- Fits compatible 2 in seacocks
- Bronze construction
- Includes winterizing adaptor
- Restores normal flow with the plug in place








