Nobilangelo Thetrick with these units is to get more than one--at least two--and connect them in series in your plumbing, so that cold water flows into the first one then warm water from the first one flows into the second one then hotter water flows into the third one. Two or three in a row are needed to get a good temperature and flow-rate for a shower.

Nobilangelo Theonly way to get hotter water is to put two, or three, in line in your plumbing, so that cold water flows into the first one, then the warm water from the first one flows into the second one, then if you need a third the heated water from the second one flows into the third one, and flows from there to your shower.

Nobilangelo I was dismayed to find that after several months\' use of the first one that I bought the red projection failed. Perhaps the internal connection is not robust enough to stand being changed a lot. I was changing mine twice a day so that it projected one way during the day and a different way at night so that it projected the time in large digits at the foot of my bed. I hope that that failure is not a weakness of design and that the other two will not also fail in the same way. That would be a pity, because this is otherwise a very fine product.

Nobilangelo And so it proved when the base-plate had been adjusted to fit my lathe. An excellent product.