Boat Heat Exchanger Price $0.00 Prev Next Product Description Marine Heat Exchanger. We can design and fabricate or restore tube-in-tube heater exchangers used in salt water and marine application. Please contact us directly to discuss your specific needs. The Brassworks mailing address is: The Brassworks 500 Linne Road - Unit I Paso Robles, CA 93446 Telephone 805-239-2501 Facsimile 805-239-2545 Email firstname.lastname@example.org Hours of operation are from 8:30AM-4:30PM PST. Saturdays by appointment.