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Do I need two downspout hanger kits if creating loop in downspout?
Self-Regulating De-Icing Cable – SRK
To avoid unnecessary t-splicing, Warmup recommends that you create a loop in downspouts. Two downspout hanger kits should be used to protect the heating cable from damage caused by sharp gutter edges, and to provide strain relief for both on the way down and back up the gutter.