Vaillant 252457 Vorrangumschaltventil 252457 für VAS 106/3 zeoTHERM, u.w. VC 104/3-E VC 105/3-E, VC 105/3-E R1 VC 126/2-C, VC 196/2-C, VC 246/2-C VC 136/2-E, VC 206/2-E, VC 276/2-E VC 136-E, VC 276-E VC 146/4-7, VC 206/4-7, VC 276/4-7 VC 194/3-C VC 195/3-C, VC 195/3-C R1 VC 204/3-E, VC 254/3-E VC 205/3-E (R1), VC 255/3-E (R1) VC 356/2-E VC 356-E VCW 194/3-C , VCW 244/3-C VCW 195/3-C, VCW 195/3-C R1 VCW 196/2-C, VCW 246/2-C VCW 204/3-E, VCW 254/3-E VCW 205/3-E (R1), VCW 255/3-E (R1) VPM 20/25, 30/35 W VSC 126-C 140 R1, VSC 196-C 150 R1 VSC 126-C 140, VSC 196-C 150 VSC 196-C 150 R2 VSC S 196-C 200