Unfortunately, the 2nd house waterworks had to be returned. Delivery and service on the part of Amazon is exemplary, but not the build quality of the Einhell house waterworks. In both cases, began after a while the house waterworks "hell" to scream loudly. It has the fan solved! I have the Einhell Customer (ISC GmbH) written and asked for a service appointment. Answer: We regret the defect found on your Gerät.Leider we can fix the problem in our factory. If we find any defect in our standardized error analysis, so you will be charged with EUR 17.60 plus shipping and VAT. And sent your device back the effort. Unfortunately, I always had the circumstance, and expand again to have the waterworks in a wet well. The package to the post office and so on. Now I have decided at the 3rd attempt for a Grundfos domestic water supply. I hope that I finally have peace. At much higher price and due to the good reputation should be assumed.