Combining the functions of a muffler and gooseneck the waterlock NLPG saves installation time and space whilst maintaining the essential qualities of a good exhaust system. The gooseneck prevents water back filling the exhaust and the muffler creates additional water mixing to further exhaust noise. The results are impressive and all with negligible back pressure in the system. Both the section and hose connections of this model are fully rotatable, ensuring ease of installation. A hose stub to connect an air vent is standard. Available with hose connection of Ø: 40 / 45 / 51 / 75 / 90 mm.