For emergency response, you can call or text this number (781) 389-4384. Cassidy Plumbing & Heating is a trusted plumbing and heating company in Arlington, MA, serving homes and businesses within a 20-mile radius, including Lexington, Belmont, Winchester, Cambridge, Medford, and Waltham. Our licensed plumbers provide repairs, installations, water heaters, boilers, drain cleaning, and 24-hour emergency plumbing services. Known for fast response, honest pricing, and quality workmanship, Cassidy Plumbing & Heating is your reliable local plumber and heating specialist in Arlington and surrounding Middlesex County towns.