hp-Technik 18/28 coupling

The hp-Technik 18/28 coupling is a component used in oil burner supply lines, joining hoses or tubes between the oil pump, filter, and nozzle assembly. Such couplings are designed to provide a leak-tight connection under the operating pressures typical of oil firing systems. They are found on the pipework that carries fuel from the tank to the pump and from the pump to the nozzle. When replacing a coupling of this type, select it by the thread size and type (e.g., BSP or metric), the bore diameter of the hose or pipe it must fit, and the sealing method – either a tapered thread requiring sealant or a flat-faced design with an O-ring. Ensure the coupling material is compatible with the fuel oil used (standard domestic or heavier industrial grades). A common failure point in oil lines is a loose or deteriorated coupling that allows air ingress, causing the pump to lose prime, or fuel leakage, which is a safety hazard. Always use a new copper washer or O-ring when reassembling. The catalogue lists this article under oil filters, coils, tubes and hoses, confirming its role in the fluid network rather than in the pump or control assembly. No further specifications are provided for this specific article beyond its article number and manufacturer codes.