JWM has been recognized for its excellence since it started manufacturing copper fittings for the first time in Korea, in 1979. JWM was nominated as the manufacturer of “World’s best product” in 2005 by the Korean Ministry of Industry and has also developed its own technology & manufacturing processes.
With the basis of rigid quality control, JWM set up the mass production system to manufacture copper fittings. JWM is able to supply most sizes of copper fittings in various standards of industrial applications, such as water supply, gas, sanitation, cooling/heating, as well as plant plumbing.
As well as the Korean market, JWM currently supplies it’s quality products to the USA, the UK, Japan, Australia, etc. with the required certification for each country. JWM continues to develop its business partnerships throughout Asia, Europe, North America and the Middle East.
Press Fittings
JWM copper press joint fittings, in sizes ranging from 1/2” to 4”, are manufactured to exceed the industry standards for performance, quality, and appearance. It offers over 350skus, with certifications and listings for use in international markets.

Plumbing Fittings
JWM’s fittings are available in a full range of sizes and configurations for markets throughout the world. With the broadest range of certifications and approvals, its fittings are sold in over 30 countries worldwide.
Quality and consistency in its solder end products are its hallmark.
HVAC Fittings
JWM offer a complete line of solder end fittings for use in the HVAC market. Its fittings are available in a full range of sizes and configurations for markets throughout the world. With the broadest range of certifications and approvals, its fittings are sold in over 30 countries worldwide. Quality and consistency in its solder end products are its hallmark.
Today JWM has achieved a market leading position in the Korean market. At the same time, JWM has been growing its worldwide customer base. With this growth, JWM was awarded the “30 Million USD Export Tower” in 2006 and the ‘Gold Tower Order of Industrial Service Merit’ in 2014 by its recognized contributions to the industry. In 2016, Mueller Industries, Inc. acquired a majority interest in JWM.
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