Features. The Filter reduces dry skin and scalp, reduces fading for color treated hair and makes your skin healthier and younger looking. The Rainshowr Shower Filter System is tested and Certified by NSF International Against NSFANSI Standard 177 for the reduction of free chlorine. The works great with handheld showerheads or use your own showerhead. The Rainshowr Filter System reduces sediment tooSpecification. Medium - KDF-55. Operating Pressure psi - 30 - 100. Operating Temperature F - 40 - 120. Operating Temperature C - 4.4 - 48.9