This product is a life saver in the kitchen. Every time one starts to leak or otherwise fail, we find we just have to replace it because we use it all the time. The last one lasted 6 years, which is about what the previous ones lasted. 
This time we were able to just get the tank (and filter and plastic lines which we did not use). The tank fit into the area that the previous one fit in. It took less than 30 minutes to install. Hopefully this will last another 6 years!