Description: These single- or double-wall products are for commercial facility domestic water applications. Paired with tanks of varying size — from 80 to 2,500 gallons — the systems can efficiently heat between 5 and 300 gallons per minute. When coupled with the company’s Ultonium-lined or duplex stainless steel alloy storage tanks, building owners or managers experience reliable, high-volume domestic water heating. Units come with grooved connections for easy boiler hookup, and the double-wall versions provide leak and cross-contamination protection, safety, thermal efficiency, and durability in a compact design. The heat exchanger’s peripheral braze creates a strong assembly. Its four dedicated leak ports provide quick and easy leak detection.