Isolation Valves for EFIT SUSTAIN 830 VUW306 CBI NG

Vaillant 178980 Bypass Valve Assembly - ecoTEC Plus VU/ecoTEC Plus VUW
Part No: 1376538 / MPN: 178980

Vaillant 0020237686 Service Valve - Ecofit Pure VUW/Ecofit Sustain VUW
Part No: 1388390 / MPN: 0020237686