{ } Erica Buist, The Guardian Recommended by Waterwise. Because the flow is not aerated, there is no loss in temperature. It works without the sieve plate found on most shower heads, which means it is cleaner with less places for bacteria to live, & also reduces limescale. Because of this, the Pulse Eco shower head has a lifetime guarentee, which means it won't clog up. Lifetime guarantee against limescale. Suitable for all showers, including electric systems, that have a water output of more than 5 litres per minute*. * To work out the output of your shower: Available in Chrome. View all the eco products in our section, or click on any of the links on the left hand side to see more.