typically every 3 to 5 years depending on local water conditions

Silent Operation: Designed for quiet mechanical switching

non-acid soldering flux solution designed to streamline the pipe-joining process

Always verify your unit

verify if 240V is reaching the coil when the system is commanded to switch modes

Weil McLain 383-500-628 Transformer typically every 3 to 5The Weil McLain 383 500 628 Transformer is a heavy duty, factory specified 120V to 24V step down transformer designed for critical power distribution within high efficiency hydronic systems. This 50VA boiler transformer provides a stable 24VAC secondary output, ensuring consistent low voltage signaling for the Weil McLain Ultra boiler control board and ignition sequences. As a direct replacement for the legacy 511 802 011, it is engineered to handle