Vaillant 193537 O ring

This Vaillant packing ring is designed for use in the heat exchanger of COMBIcompact VCW (conventional flue), ecoMAX VU (condensing), ecoMAX VUW (condensing), ecoTEC VU (condensing), ecoTEC VUW (condensing), THERMOcompact VU (fan-assisted), TURBOmax VUW (fan-assisted), COMBIcompact VCW (fan-assisted), THERMOcompact VC (fan-assisted), aquaPLUS VUI (fan-assisted), ecoTEC VUI (condensing) and THERMOcompact VC-VCW (balanced flue) boilers. O-rings, gaskets and washers are used in many different areas of the boiler to join parts to pipework. Among others sections, heat exchangers and gas valves require these parts to prevent gas and water leaks.