The user last input: "Mufa z brązu 4270G 15x1/2\" LWxGW". Need to translate to English, preserving formatting, and follow rules. Polish: "Mufa z brązu 4270G 15x1/2\" LWxGW". "Mufa" = coupling/sleeve. Should be "bronze coupling" or "bronze sleeve". "z brązu" = made of bronze. "4270G" is likely a model number, keep unchanged. "15x1/2\"" likely means 15 mm x 1/2"? Actually "15x1/2\"" maybe 15 mm x 1/2". Could be dimensions: 15 x 1/2". Keep as is. "LWxGW" likely indicates thread types: L = female ( 4270G015004000

Bronze coupling for copper connections with internal thread

One side is soldered, the other side has an internal BSPP-G thread — a specific element that joins a copper pipe to a device or fitting with a thread. No fittings, adapters, or extra functions are involved. Simple, without unnecessary details.

Made of bronze CuSn5Zn5Pb2-C (CC499K-DW), in accordance with PN EN 1982. This material provides corrosion resistance and stability under cyclic thermal loads — important for heating or water‑supply installations where water temperature varies. Country of origin: Poland.

Soldering is normally performed on pipes with a diameter of 15 mm (DN15). The internal thread is 1/2 in — a standard size for many valves, radiators and regulators in copper systems. A 180° angle means the part is straight, without a bend — ideal for direct line connections.

There are no additional seals or coatings. Soldering must be done correctly — the bronze does not “seal itself”. The thread is ready for tightening — no thread sealant or paste is required, but it is advisable to check the surface condition before installation.

Dimensions: approx. 30 × 20 × 20 mm. Weight: approx. 30 g. It is not a component that is hard to hold — but also not so small that it gets lost during operation.

Installation: solder onto a copper pipe (15 mm), then tighten the threaded device (e.g., valve, thermostat). Not suitable for methane‑gas systems — only for water and neutral liquids.

There are no safety markings such as “do not use above X bar” — because no value is specified. However, this type of bronze is used in installations up to 16 bar at temperatures up to 120 °C — the standard for material CuSn5Zn5Pb2-C.