Located in Devon Pa and serving regions of Pennsylvania, NJ and Delaware with engineered plumbing and mechanical equipment for over 50 years. Thomas McCarthy associates specializes in pre-insulated underground steam, chilled water, hot water, and fuel oil distribution systems. Along with water heating systems, fire protection pumping systems, and domestic water booster systems. Thomas McCarthy associates works with both engineers and end users to select the best fitting equipment for any application across each product line. Striving to achieve a sound relationship with customers by providing the best products of the industry. Including Thermacor Process pre-insulated pipe, Hubbell water heaters, Peerless fire pumps, Innerlynx seals, and Crane pumps and systems.