For exhaust hose with internal diameters of 40mm I.D. Provided with a plug for draining during winter time. The inlet connection of this models will revolve through 360°, which greatly facilitates the installation of the exhaust assembly.A Vetus Waterlock will collect the cooling water present in the system when the engine is stopped. In addition, a Vetus Waterlock has great sound-deadening capabilities and acts as a very efficient muffler. The size of the water lock is not only determined by the diameter of the exhaust hose, but also by the quantity of water that must be collected.Capacity: 4.3 Litres.