Groco SSC-1500 Engine Flush Service AdapterThe Groco 1-1/2" Engine Flush Service Adapter adds safety and flexibility to any water system. Simply add the SSC to the top of any seacock to allow for instant emergency bilging pumping or for easy winterization and cooling system flushing.Specifications: Hose ID: 1-1/2"; Thread NPT: 1-1/2"; Overall Length: 4.75"; How to Use: Emergency Use - While the engine is running, close the seacock and remove the quick release plug. Excess bilge water will then pumped overboard by the engine war water pump. Add Groco BSA to pump out remote bilge locations.; Winterization Use - Close the seacock and remove the quick release lug. Then insert the included service adapter. Anti-Freeze can then be pumped into the cooling system.; System Flushing Use - Close the seacock and insert the service adapter. Dockside water can be used to flush the cooling system with the engine running at idle speed.;