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Condensing central heating boilers and freezing. My parents have a new Wooster central heating boiler, and the condensate pipe filled up with ice. The boiler made gurgling noises and then tripped out. Lucky the weather was not too bad and I was able to get there, and heat the pipe so removing the frozen condensate. However it would make sense to fit some form of trace heating. It seems the pipe goes through the wall near horizontal then about 30 degrees fall to drain and it was the horizontal section which caused the problem. Since this is in the wall putting any trace heating on outside of pipe will not be easy. This makes me ask what about inside the pipe. There will be a problem with acid I know and any element which can get wet would need to be supplied from a SELV supply. But here is the point. There must be thousands of people with the same problem and it seems inconceivable that an answer has not been found with some special pipe with trace heating built in designed for this very job!
So what have others used to keep the condensate pipe free from ice.
So what have others used to keep the condensate pipe free from ice.