EasyHeat’s SR and TSR self-regulating electric heat trace cables are now CSA and CSA-UL approved and comply with recent requirements in NFPA 13 for freeze protection from main water lines to fire sprinkler heads. EasyHeat Self-Regulating cables prevent non-flowing water in branch fire sprinkler lines from freezing in ambient temperatures down to -40 F. Engineered to provide an exact level of heat where it is needed, SR and TSR cables automatically vary heat output, allowing the cable to be overlapped without creating hot spots during operation. The cables can be cut to length and are waterproof.