It worked! After many years of use, our long-awaited nightmare happened. We had a leak (and not a small one!) in the middle of winter. I urgently had to let go and order a part, in the spring I finally got around to replacing the defective part. only to find, after the job was done, that we were losing water somewhere else. We ordered this "Leckfix" but we had our doubts. However, after 3-4 uses, the hose stopped flowing. We never found the problem spot like we did using "Fix the Leak" and it's been holding for 2 months now. The only reason I gave it 4 stars was that it took several uses to completely stop the leak. But I would definitely recommend this to a friend if they told me they had a leak and couldn't find where under all that insulation
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