Vaillant Ecomax Pro 18/28 & ecoTEC 415/418/428/438 Gasventil 053574
Part No: - 053574. Ecomax Pro 18 E VU 186-0 2003-2007 - 41-044-30. Ecomax Pro 28 E VU 286-0 2003-2007 - 41-044-31. Genuine Vaillant Part Not a cheap Chinese make. Ecotec Plus 415 VU 156/2-OH 2006-2015 - 41-044-53.