"the water contact, 95 percent of the time, is against plastic," Christensen says. Kohler's Mirjam Luppuner Konsek adds that older pre-plastic shower heads tend to clog up with calcified deposits ...

That's going to feel like a real old-fashioned shower. But because it is recirculating, one uses a fraction of the water and the energy. Interestingly, there is an accessory telephone shower that ...