Ultraviolet Ballasts are crucial in the performance of your UV water filtration systems that disinfect your water. They use initially high voltage to spark the UV Lamp, and when an arc is achieved the ballast limits the voltage enough to keep the lamp illuminated, whilst regulating the power draw of the UV Lamp. Without a good quality Ballast, the current in the lamp would increase to the point where it the lamp would blow due to the excessive voltage and negative resistance. Due to the demand on the Ballast, it may fail after a prolonged use and need to be replaced with a new one. We offer a range of ballasts power supply replacements. Browse our range below.