- Suitable for Vaillant: Solar station 1-4, Solar station 22 I, Solar station 6 l/min (single line), VC 126/196/246 EC, VC 180 K XE/ 180 XE/182242 E/184/244 XE/185/245 E/240XE, VCW 180 K XE/180 XE/182 E/184/244 XE/185/245 E/196/246 EC/240 XE/242 E, VKC 11-23/1 E/11-21/2 E/11-21/3-1 XE/D 11-23 E, VKP ...