Vetus Waterlock Type LPRThe Vetus WLOCKLPR is an exhaust waterlock made from synthetic materials. Vetus LP waterlocks feature a complex design to prevent water flowing back down the exhaust line to the engine when it is switched off. Coolant water and exhaust gas enter the inlet on one side of the waterlock and exit on the other side, after going through the specially designed inside shape. This plastic Vetus waterlock is supplied with a drain plug to help with winter