The Solder Ring Reducing Coupling (28mm x 15mm) is an essential plumbing fitting designed to connect and transition between two different copper pipe sizes, stepping down a main 28mm line to a 15mm section. Ideal for domestic and commercial central heating systems, hot and cold water networks, and general plumbing installations, this reducer provides a smooth, reliable transition in pipe diameters within a compact space.
 
Manufactured from high-grade copper conforming to relevant British Standards (such as BS EN 1254), the fitting features a pre-formed ring of lead-free solder embedded directly within each socket. This integrated solder design eliminates the need for manual solder wire application during assembly, ensuring an exact, pre-measured amount of metal is drawn evenly into the joint via capillary action when heated, creating a robust, permanent, and leak-free seal.
 
Engineered for efficient installation by professional plumbers and experienced practitioners, the coupling requires standard pipe cleaning, fluxing, and blowtorch heating to activate the internal solder rings. Whether you are scaling down central heating pipework, adapting a hot water supply run, or completing a complex plumbing layout, this trade-quality reducing coupling delivers dependable structural integrity, excellent corrosion resistance, and long-term hydraulic performance.