OEM-quality replacement seal for the Eberspaecher Hydronic 10 (M10) control unit. Ensures a proper, leak-free interface between the control unit and burner housing — a critical service item whenever the control unit is removed. What's Included 1x Control Unit Seal (OEM-spec, Eberspaecher Hydronic 10) Not Included Control unit, burner housing, or other hardware Key Features Seals the interface between the control unit and burner housing Prevents combustion gas and moisture ingress OEM-grade material for reliable, long-lasting performance Inspect and replace as needed during any control unit service Compatibility Eberspaecher Hydronic 10 / Hydronic M10 Espar D9W SKU: 25.1816.01.1300