Vaillant O-Ring, (x10) 981176 VC 104/3-E VC 105/3-E (R1) VC 107 E VC 112 E VC 166+206+256 E VC 180 K XE VC 180+240+280 XE VC 182+242 E VC 184+244 XE VC 185+245 E VC 194 XE-C VC 194/2 XE-C VC 194/3-C VC 195 E-C VC 195/2 E-C VC 195/3-C (R1) VC 204+254 XE VC 204+254/2 XE VC 204+254/3-E VC 205+255 E VC 205+255/2 E VC 205-255/3-E (R1) VCW 180 K XE VCW 180+240+280 XE VCW 182+242+282 E VCW 184+244 XE VCW 185+245 E VCW 194 XE-C VCW 194/2 XE-C VCW 194+244/3-C VCW 195 E-C VCW 195/2 E-C VCW 195/3-C (R1) VCW 204+254 XE VCW 204+254/2 XE VCW 204+254/3-E VCW 205+255 E VCW 205+255/2 E VCW 205+255/3-E (R1) VCW 206+256 E