While other products may gather unsightly mineral build-up over time, Delta soft rubber Touch-Clean spray holes allow any mineral residue to simply be wiped away for an instantly refreshed look with no need for soaking or the aid of chemical cleaners. Delta pressure-balance valves use Monitor Technology to protect you and your family from sudden temperature changes. Delta WaterSense labeled faucets, showers and toilets use at least 20% less water than the industry standard saving you money without compromising performance.