ESAs extend the manufacturer's warranty on expensive HVAC / R / plumbing equipment, and protect against unexpected and untimely costly repairs. We can cover all brands and types of equipment. To fix your HVAC/R and plumbing equipment when it fails. Our services relieve your store personnel from searching for a qualified, insured contractor to repair your equipment. Trinity is unique to many third-party administrators (TPAs); providing extended service agreements and commercial facility maintenance management services.