Copper nipple, 5243 18Ax15 LZxLW 5243 018015000

Simple copper soldering fitting, 18 mm socket on one side, 15 mm sleeve on the other

This is not a typical nipple – it is a component designed for a precise connection of pipes with different diameters in a single step. The 18 mm socket and 15 mm sleeve allow a smooth transition between two standard copper pipe sizes without the need for additional adapters or complex assemblies.

The material is pure Cu‑DHP copper with 99.99 % purity – deoxidized with phosphorus, meaning it contains no oxides that could affect solder quality. This provides not only better conductivity but also higher corrosion resistance and longer joint lifespan. All of this complies with PN EN 1254 – a standard that is a requirement for water and heating installations, not merely a suggestion.

The connections are soldered – both ends are shaped for hard or soft soldering. There are no threads, no seals. It is a simple, leak‑tight, durable method that has been proven for decades. In practice: if you have an 18 mm pipe on one side and a 15 mm pipe on the other, this element lets you join them without additional modifications.

Physical dimensions are compact – about 30 mm in length with a diameter of roughly 20 mm. This means it can be installed even in tight spaces: behind walls, in installation cabinets, near boilers. The weight is only about 10 g – it does not burden the structure or hinder transport.

There are no “high‑quality” or “robust construction” claims here – just Cu‑DHP copper, shaping according to the standard, and two precisely profiled ends: one for soldering to an 18 mm pipe, the other to a 15 mm pipe. Nothing more. Nothing less.

Application: heating, cooling, and water supply installations – anywhere copper pipes are used and you need to connect two different diameters without breaking the line. It is not intended for systems operating above standard pressure, but under normal working conditions (up to 10 bar at temperatures up to 120 °C) it performs flawlessly.

There are no “manufacturer guarantees” or “failure‑free operation” statements – this is not advertising. It is a technical component. If the soldering is performed correctly, the joint will remain leak‑tight for the entire life of the installation.