40 MM WLOCKR Waterlock Muffler | Vetus WLOCK40R Marine exhaust waterlock/muffler reduces noise and prevents backflow in marine generator or sailboat applications. Vetus type WLOCKLR muffler 1 9/16 in. hose connections accepts 1 1/2 in. (40mm) inside diameter marine exhaust hose Designed to capture water in the exhaust once the engine has stopped Inlet rotates 360 degrees Fitted with a drain plug for easy winterization Features a reduced height of 8 5/16 in. for easy installation under floor 1.05 gallon capacity 14 21/32 in. overall length 4 11/32 in. width 8 5/16 in. height Ideal for gasoline or diesel inboard engine, sailboat engine, and marine generator applications For use above or below the waterline 3 year warranty Replacement drain plug P/N VETUS-DRAIN Replacement hose connection o-ring P/N US001 Replacement hose connection P/N US004