Check the listing for details. Saltwater Shell & Tube Heat Exchanger 55kBtu Titanium Opposite Side 1&3/4"FPT. Condition: New. Listed at 294.99 USD. Saltwater Shell & Tube Heat Exchanger 55kBtu Titanium Opposite Side 1" and 3/4" FPT High Heating Efficiency for Pool Heating and Salt Water Systems! Our innovative spiral twisted corrugated tube design is engineered to maximize solar or boiler energy, increasing the overall thermal efficiency of the system. We offer these marine water heat exchangers with capacities ranging from 55kBtu to 6000kBtu, made from either Stainless Steel 316L or Titanium, and with either opposite- or same-side ports. This product has a 6 year warranty against manufacturer's defects. This listing is for the Stainless Steel 316L version. The Titanium version is highly recommended for salt water systems, as it is the only model that can withstand that kind of water. This model works with pools of up to 3,960 US gallons with 55kBtu/hr at 140F temperature difference between inlet water and heated water. Applications of Saltwater Shell & Tube Heat Exchanger: Outdoor Wood FurnacesPool/Spa/Hot Tub HeatingResidential and Industrial ApplicationsWater HeatingForced Air Heating SystemsFloor HeatingSnow MeltingSolar Hot Water HeatingMariculture FAQ and Support: Tips for operation: For start-up, open the valves gradually to increase flow and pressure in the unit. Then let cold water into the system, followed by hot water. Be sure to check the connections for leaks. When you're done using the heat exchanger, stop the hot water supply first and then the cold water supply. We have worked with heating systems for over 10 years and are happy to help you with any questions or concerns that you may have. You can message us here on Ebay for help with your heating projects. Shipping: Free shipping on orders of $90 or more.All orders require a signature upon delivery. If this is an issue for you, please let us know immediately so we can waive the requirement. If you need an order sooner, contact us and we can arrange for faster shipping. A charge may apply depending on the type of expedited shipping selected. The order will be shipped to the address you provide at checkout. If you need to change the address, please contact us through Ebay's messaging system. We are closed on Saturday and Sunday. Any orders placed after 2pm (EST) on Friday will be shipped out on Monday when we're open again. We are also closed for major holidays. Any orders placed during a holiday will be shipped out when we are open again. Alaskan, Hawaiian, and non-US customers, we are able to ship to you. Please ask for a shipping quote.