Vaillant Ecotec Pump 178983, designed for various Vaillant Boilers. Ecotec Plus 612. Ecotec Plus 612 VU 126/3-5 2005-2005 - GC No. 41-044-44. Ecotec Plus 612 VU 126/3-5 R1 2005-2012 - GC No. 41-044-44 R1.
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