Every gas stove that leaves a CKD assembly line must be leak-tested. But there are several ways to test, each with different cost, speed, and sensitivity. Choosing the right method is one of the most important equipment decisions you will make. Here is a clear comparison of the main gas leak testing methods.
This is the industry standard for production lines. The stove's gas system is pressurized, then isolated, and a sensor measures any pressure drop over time. A leak shows up as a measurable decay. Pressure decay testing is fast, repeatable, and sensitive enough to catch small leaks — ideal for testing every unit on a moving line.
The traditional, low-cost method: apply a soap solution to joints and watch for bubbles. It is simple and requires almost no equipment, but it is slow, relies on operator attention, and can miss very small leaks. It works well for spot checks and troubleshooting, but it is not practical for high-volume, every-unit testing.
Electronic leak detectors use a probe that senses the presence of gas near a joint, often with an audible or visual alarm. They are highly sensitive and fast for pinpointing leak locations, but they detect gas in the air rather than measuring system integrity, so they are best used alongside pressure decay for locating the source of a detected leak.
Most responsible CKD operations combine methods: pressure decay for pass/fail testing every unit, with electronic detection or soap bubbles to locate leaks when a unit fails. The exact choice depends on your volume, budget, and gas type. THREEMI advises CKD partners on leak testing equipment and methods, helping you build a testing process that protects your customers and your brand. Contact us to plan your QC setup.
THREEMI is the export brand of Shenzhen Sanmi Manufacturing Co., Ltd., a professional gas stove and kitchen appliance factory in Guangdong, China. With 400+ employees, a 20,000㎡ production facility, and an annual output of 3 million units, we serve wholesalers, distributors, brand owners, and e-commerce sellers in over 30 countries. Our factory is certified ISO9001, CCC, CE, UL, GS, ETL, NF, and SASO.
We supply complete gas stove CKD (Complete Knock Down) kits, plus assembly guidance, worker training support, and equipment purchasing advice — so you can build a reliable local manufacturing operation. Contact us to plan your CKD program.
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