New & Boxed Viessmann Vitodens 100W WB1HA 30 35 KW System Erp Gas Valve 7849854 Genuine Viessmann part - Item may be boxed or unboxed. Overview Viessmann 7849854 Gas Valve 30/35kW for limited 100-W Boilers, Check Features. Suitable for Viessmann 100-W B1KA Combi Boilers (30,35kW) Suitable for Viessmann 100-W WB1C Combi Boilers (30,35kW) Suitable for Viessmann 100-W WB1C System Boilers (30,35kW) Suitable for Viessmann 100-W B1HA System Boilers (30,35kW)
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