The user last input: "Mufa z brązu 4270G 12x3/8\" LWxGW". Need to translate to English, preserving formatting, and follow rules. Polish: "Mufa z brązu 4270G 12x3/8\" LWxGW". "Mufa" = coupling/sleeve. Since it's bronze, "bronze coupling". "4270G" is model number, keep. "12x3/8\"" likely means 12 mm x 3/8". LWxGW indicates female/male? In Polish, "LWxGW" stands for "Lewa/Right"? Actually "L" = left? In fittings, "L" = left-hand thread? "W" = female (wewnętrzny), "G" = male (zewnętrzny). "LWxGW" m 4270G012003000

Ideal soldered‑threaded connection for copper installations

The coupling made of bronze CuSn5Zn5Pb2‑C (CC499K‑DW) meets the requirements of standard PN EN 1982 and is intended for the permanent joining of DN 12 pipes with 3/8 in (BSPP‑G) threaded components. Thanks to its simple shape and a 180 ° arc angle, it provides quick installation and reliable sealing in heating and sanitary systems.

Features and construction

• Material – high‑grade bronze, corrosion‑resistant and water‑proof, extending the service life of the connection.

• Soldered connection – enables a solid joint with DN 12 pipe while allowing later modification of the installation.

• Internal cylindrical gas thread BSPP‑G (ISO 228‑1) – standard 3/8 in (10) thread, compatible with a wide range of installation components.

• Straight shape, 180 ° arc angle – facilitates fitting in tight spaces and minimizes stress during assembly.

• Made in Poland – guarantees quality control and compliance with European standards.

Applications and benefits

• Heating systems – ideal for joining copper pipes in central heating circuits where high temperature and pressure resistance are required.

• Sanitary systems – suitable for water supply connections thanks to the bronze’s resistance to drinking water.

• Easy installation – solder on one side and quickly screw the thread on the other, eliminating the need for additional tools or fasteners.

• Safety – the sealed joint prevents leaks, reducing the risk of system damage and lowering operating costs.

This coupling is part of the 4000 series, dedicated to professional installers and demanding end‑users who value reliability and simplicity of installation.