Enerbras Enershower 4T Instant Shower Head Replacement Heating Element – For Hard Borehole & Soft Normal Water. Upgrade your shower performance with the Enerbras Enershower 4T Instant Shower Head Replacement Heating Element, engineered for strong, reliable, and consistent heating whether your home uses hard borehole water or soft normal water. This high-quality heating element restores your instant shower’s efficiency, ensuring fast heating, stable water temperature, and long-lasting performance. Enerbras Enershower 4T Instant Shower Heating Element for Hard Water. Enershower 4T Replacement Heating Element for Borehole and Soft Water. Enerbras 4T Shower Head Heating Element for Hard and Soft Water Use. Enershower 4T Instant Shower Heating Element for Borehole Water. Enerbras Enershower 4T Heating Element Compatible with Hard Water.