AB 38'' Side Arm Heat Exchanger Single Wall Fin Heat Exchanger Fin-Enhanced Stainless Steel 304 1" FNPT Water Heater and 3/4" FNPT Cold Water 23,000 Btu/hr - Amazon.com
Side Arm Heat Exchanger Outdoor Furnace Boiler Stove - Heaters Water Heaters - Amazon.com
33" Single Wall Stainless Steel Tube and Shell Sidearm - The Log Boiler
Water Heater Sidearm Heat Exchanger - general for sale - by owner - craigslist
Solar DHW In-Tank Heat Exchangers | phcppros
Wood Furnaces of Ohio | Online Store for Central Boiler Parts & Accessories