Keep your pool system performing at its best with the Hayward Transformer Retrofit Kit for Thermocraft Junction Box.

The Hayward LRBUY11T65 Transformer Retrofit Kit for Thermocraft 70W Junction Box is a genuine OEM electrical upgrade solution designed to modernize or replace the transformer used in Thermocraft-style 70W junction box installations at your pool or spa equipment pad. This retrofit kit includes a top-tier 70-watt transformer that converts standard utility line voltage into stable low-voltage power (typically 24 Vac) used by control systems, sensors, automation modules, and lighting accessories.

Instead of simply swapping old components, this retrofit kit helps improve power reliability, electrical performance, and ease of installation —especially when updating older junction boxes or integrating newer low-voltage equipment. Engineered to meet OEM specifications, it supports consistent operation and built to last performance across a variety of pool and spa applications.

Have questions before you order? Our team is happy to help you pick the right part.