This is the third generation Hot Water device I've installed. The operation of the device and its installation has improved and gotten simpler each time. However, this time there was no nut and ferral included to connect the cold water line so I had to procure these simple articles in order to complete the installation!! Very irritating!!

Any way that you can make these things to last longer that 5-6 years. I'm getting old and may not be able to install another one in six years.