Why does the Outpipe kit carry a 5-year warranty while bulk cable carries 10 years?

The difference is the added kit hardware — the factory termination and plug — which have a shorter rated service life than the heating cable itself. The SR cable inside the kit is identical to the bulk SR cable with the 10-year warranty. For permanent installations where long-term performance is the priority, bulk cable terminated by a licensed electrician carries the full 10-year warranty. For plug-and-play residential applications where convenience is the priority, the kit format offers a practical, ready-to-install solution at the 5-year warranty tier.