Description Reviews The MINI Water Pipe for all generation 2 cars is the pipe that goes from the thermostat to the water pump on the back side of the engine. The fail point on this part is the o-ring and flange that goes into the water pump. It can crack or break off if the car is over heated or someone gets too aggressive when installing a new thermostat. This is a brand new part from MINI that comes with a new o-ring. 1 Review 3 it would be better if it was aluminum material tube with a clamp to water pump. Posted by neil reynes on 8th Sep 2016 this item would of been so much better if it was made of aluminum material, with cooling ribs on the tube. and that would be able to use a hose clamp to water pump for better attachment. Plastic is just not strong enough for me, for the price mini charge to buy this cars, i would of thought they would use a better performance part. it would be nice if some kind of design for this tube be re-invented. other thank this, it works for its purpose, but cheap materials. and the water pump. (again plastic). DT EDIT: This is a Stock MINI OEM part to replace a broken item, yes we agree it should be better, Maybe we will work on that!