Vaillant Diverter Valve O'Ring Seals 178978 I 0020132683

Vaillant Diverter Valve O'Ring Seals (178978 | 0020132683) The Vaillant Diverter Valve O'Ring Seals (Part Nos: 178978 or 0020132683) are high-tolerance, specialized replacement gaskets engineered for the integrated composite and brass hydraulic manifolds found in Vaillant’s prominent ecoTEC condensing boiler lineup. These precision-molded rubber O-rings provide the critical structural seal at the physical connection interfaces of the main diverter valve assembly and its internal cartridge ports. Designed to maintain structural flexibility under constant pressure, they prevent high-pressure primary fluid from tracking across internal channels or weeping externally from the hydraulic block housing. Leak Tracking Mitigation: Stops external dripping and minor weeping faults at the manifold junctions that can rust adjacent framework or short-circuit local electronic controls. High-Resilience Elastomer: Fabricated from an industrial-grade rubber compound engineered to resist long-term compression set, preventing the seals from flattening or cracking over time. Thermal & Chemical Stability: Specifically treated to endure extreme hot water temperature spiking, system pressure fluxes, and continuous exposure to commercial central heating inhibitors or black iron oxide sludge. Perfect Dimensional Seating: Precision-stamped to match Vaillant's original manufacturing tolerances, ensuring a tight, watertight seat during direct component reassembly or cartridge maintenance. Compatible Models: Vaillant Ecotec Plus 824 VUW 246/3-5 2005-2012 — 47-044-31 Vaillant Ecotec Plus 824 VUW 246/3-5 R1 2005-2011 — 47-044-31 R1 Vaillant Ecotec Plus 824 VUW 246/3-5 R3 2011-2012 — 47-044-31 R2 Vaillant Ecotec Plus 831 VUW 316/3-5 2005-2013 — 47-044-32 Vaillant Ecotec Plus 831 VUW 316/3-5 R1 2005-2011 — 47-044-32 R1 Vaillant Ecotec Plus 831 VUW 316/3-5 R3 2011-2012 — 47-044-32 R3 Vaillant Ecotec Plus 837 VUW 376/3-5 R1 2006-2011 — 47-044-33 R1 Vaillant Ecotec Plus 837 VUW 376/3-5 R3 2011-2012 — 47-044-33 R3 Vaillant Ecotec Plus 937 VUI 376/3-5 2006-2012 — 47-044-39 Vaillant Ecotec Pro 24 VUW 246/3-3 R1 2006-2008 — 47-044-36 R1 Vaillant Ecotec Pro 24 VUW 246/3-3 R2 2008-2012 — 47-044-36 R2 Vaillant Ecotec Pro 28 VUW 286/3-3 R1 2005-2008 — 47-044-30 R1 Vaillant Ecotec Pro 28 VUW 286/3-3 R2 2008-2012 — 47-044-30 R2 Vaillant Ecotec Exclusive 835 VUW 356/5-7 — 47-044-66 Vaillant Ecotec Exclusive 843 VUW 436/5-7 — 47-044-67 Vaillant Ecotec Plus 824 VUW 246/5-5 2012-2012 — 47-044-40 Vaillant Ecotec Plus 824 VUW 246/5-5 R1 2012-2013 — 47-044-40 R1 Vaillant Ecotec Plus 825 VUW 196/5-5 R6 2017 Onwards — 47-044-83 R6 (0010021823) Vaillant Ecotec Plus 831 VUW 316/3-5 R5 2013-2013 — 47-044-32 R5 Vaillant Ecotec Plus 831 VUW 316/5-5 2012-2012 LPG — 47-044-46 Vaillant Ecotec Plus 831 VUW 316/5-5 2012-2012 NG — 47-044-41 Vaillant Ecotec Plus 831 VUW 316/5-5 R1 2012-2013 LPG — 47-044-46 R1 Vaillant Ecotec Plus 831 VUW 316/5-5 R1 2012-2013 NG — 47-044-41 R1 Vaillant Ecotec Plus 832 VUW 246/5-5 R6 2017 Onwards LPG — 47-044-85 R6 (0010021825) Vaillant Ecotec Plus 832 VUW 246/5-5 R6 2017 Onwards NG — 47-044-84 R6 (0010021824) Vaillant Ecotec Plus 835 VUW 306/5-5 R6 2017 Onwards — 47-044-82 R6 (0010021822) Vaillant Ecotec Plus 837 VUW 376/5-5 2012-2012 — 47-044-42 Vaillant Ecotec Plus 837 VUW 376/5-5 R1 2012-2013 — 47-044-42 R1 Vaillant Ecotec Plus 838 VUW 286/5-5 R6 2017 Onwards — 47-044-86 R6 (0010021826) Vaillant Ecotec Plus 937 VUI 376/5-5 2012-2012 — 47-044-43 Vaillant Ecotec Plus 937 VUI 376/5-5 R1 2012-2013 — 47-044-43 R1 Vaillant Ecotec Plus 938 VUI 286/5-5 R6 2017 Onwards — 47-044-87 R6 (0010021827) Vaillant Exclusive 627 VU 256/5-7 — 41-694-02 Vaillant A00557-01