Vaillant O-Ring, (x10) 178991 VCC 206/4-5 150 (R1) VCC 266/4-5 150 (R1) VCI 196+246/3-5 (R3,5) VCI 206+266/5-5 R2 VCI 206+266/5-5 R4 VCI 206+266/5-5 R5 VCI 206+266/5-5 R6 VCW 194+244/4-5 (R1), 204+254/4-7 (R1,2) VCW 194+244/4-5 A R6, 204+254/4-7 A R6 VCW 194+244/4-5 A, VCW 204+254+/4-7 A VCW 195+245/4-5 (R1) VCW 196/3-5 A (R3-5) VCW 196+246/3-5 (R3,5) VCW 206+266/5-5 R2 VCW 206+266/5-5 R4 VCW 206+266/5-5 R5 VCW 206+266/5-5 R6 VCW 266/5-7 VE 6-28/ 14 EU I VIH CL 20 S VSC 126+196/2-C VSC 126+196/3-5 R2,3 VSC 126+196-C R3 VSC 126-196/3-5 (R1) VSC 146+206/4-5 150 (R1) VSC 146+206/4-5 200 (R1) VSC 146+206/4-5 90 (R1) VSC 194-C 150 (R1) VSC 246/2-C VSC 246/3-5 (R1) VSC 246/3-5 R2,3 VSC 246-C 210 VSC 246-C R3 VSC 266/4-5 150 (R1) VSC 266/4-5 200 (R1) VSC D 146+206/4-5 150 R1 VSC D 146+206/4-5 190 R1 VSC S 126+196/2-C VSC S 126+196/3-5 (R1) VSC S 126+196/3-5 R2,3 VSC S 146+206/4-5 150 (R1) VSC S 146+206/4-5 190 (R1)