K37 - Uniweld K37 Air/Acetylene Soft Flame Plumbing Kit with TH3 Handle

Professional Grade Air/Acetylene Soldering Kit

The Uniweld K37 Soft Flame Kit stands as a testament to precision and reliability in the world of plumbing and HVAC maintenance. Designed specifically for professionals who demand control and consistency, this kit utilizes the efficiency of Air/Acetylene gas to deliver a target heat of 2700°F. Unlike harsh oxy-fuel flames that can easily overheat or damage delicate copper piping, the soft flame produced by the K37 wraps around the tubing, ensuring even heat distribution for the perfect capillary action required in soldering.

At the heart of this kit is the TH3 Handle, a staple in the Uniweld lineup known for its durability and ease of use. The handle features a thumb screw connection mechanism, allowing for rapid tip changes without the need for extra tools—a critical feature when working in cramped spaces or moving quickly between job sites. The rear valve placement on the handle offers intuitive flame adjustment, giving the operator full control over the gas flow with a simple movement of the thumb or finger.

For plumbers, the K37 is more than just a torch; it is a daily driver for joining copper tubing. The 2700°F temperature is the sweet spot for soft solders, melting the filler metal smoothly without oxidizing the copper surface excessively. Whether you are installing new water lines, repairing drainage systems, or working on hydronic heating loops, the stability of the air/acetylene flame ensures a leak-free seal every time. The kit is designed to connect typically with B-tank configurations (based on the B-Air designation), making it a portable and powerful solution for service vans and maintenance carts.

Josef Gas recognizes the importance of having the right tool for the gas type. Air/Acetylene provides a hotter, cleaner flame than propane alone, reducing labor time on larger diameter pipes. The Uniweld K37 harnesses this energy efficiently, providing a safe and effective method for soft soldering applications where precision is paramount.