VAILLANT ECOTEC PLUS 831 8 PRO 28 VUW MAIN HEAT EXCHANGER 0020135131 GENUINE
Main heat exchanger for VAILLANT ECOTEC PLUS 831 8 PRO 28 VUW MAIN HEAT EXCHANGER 0020135131 GENUINE Refurbished unit bought for my boiler but we replaced the boiler in the end.