Therm 4.0kW Low Flow Trombone Heater [240V] [Caldera] [Laing 6595 & 7340] (C3473-1) is a Therm Products replacement component for heater service and replacement work. It is intended for pool, spa, or bath equipment applications where listed details such as 240V, Caldera, Laing 6595 & 7340 and part number C3473-1 match the original part being replaced. This listing is written to make identification easier by keeping the manufacturer, model references, dimensions, colors, voltage ratings, connection style, and part number visible in one place.Use this item when the existing component is worn, damaged, missing, leaking, discolored, corroded, or no longer performing correctly. The right replacement part can restore dependable heating performance, reduce downtime, and keep spa or pool equipment operating as intended while helping avoid unnecessary replacement of larger assemblies. Always compare voltage, kW rating, housing length, unions, sensors, pressure switch style, and plumbing layout before installation. When comparing parts, use the part number as the primary reference and review all size, color, finish, and configuration notes shown in the product title. Genuine or direct-fit style replacement listing for Therm Products equipment applications. Designed for the listed Heaters category and matching pool, spa, or bath systems. Helpful for repairing worn, broken, leaking, or missing components without replacing a full assembly. Review all measurements, connection types, voltage ratings, colors, and model references before ordering. Use the listed part number C3473-1 to confirm compatibility with existing equipment.
![Therm 4.0 kW Low Flow Trombone Heater [240V] [Caldera] [Laing 6595 & 7340] (C3473-1)](https://cdn.shopify.com/s/files/1/1751/9347/products/46-238-1064_xl.jpg?v=1486197411&width=480)
