Vetus Type NLP Waterlock/Muffler, made of plastic components. Suitable for exhaust hose with inside diameter of resp. 40 - 45 - 50. 40, 45 or 51 mm. Capacity is 4.5 liters. Resist to corrosion. Durable and light weight. The NLP waterlocks are of dual stage construction, featuring upper and lower chambers with a horizontal partition plate and a riser tube through the center. Compared with single stage waterlocks using only one chamberi these NLP waterlocks offer superior silencing of exhaust noise with minimal back pressure. The top chamber may be rotated through 360° and both the inlet and outlet connectors can rotate through 360°. The installation in limited spaces are simplified with the help of its compact structure. For performance at the optimum silence, combination of Vetus Muffler and Goose Neck are recommended. Maximum operating temperature is 70 ºC.