SCHWANK JS-0577-ZZ Blocked Flue Switch 1.41″ W.C.

SCHWANK JS-0577-ZZ Blocked Flue Switch Overview

The SCHWANK JS-0577-ZZ is a blocked flue switch engineered as a critical safety component for SCHWANK radiant heating systems. Set at a 1.41″ W.C. (water column) pressure differential, this switch monitors flue gas exhaust flow and shuts down the burner in the event of a blocked or restricted flue condition — protecting both equipment and building occupants from the dangers of improper combustion venting.

Key Features

• Factory-set trip point at 1.41″ W.C. (water column)
• Designed specifically for SCHWANK radiant heating equipment
• Detects blocked or restricted flue conditions and interrupts burner operation
• Provides essential over-pressure safety protection for the venting system
• Direct OEM replacement part for compatible SCHWANK units
• Helps maintain safe and efficient combustion by ensuring proper flue draft

Application

This blocked flue switch is intended for use as an OEM replacement part in SCHWANK radiant heating systems. It is a pressure-sensing safety device that monitors the flue exhaust path. When flue pressure rises above the 1.41″ W.C. setpoint — indicating a blockage or restriction — the switch opens the control circuit to shut down burner operation, preventing unsafe conditions such as combustion gas spillage.

Why Choose the SCHWANK JS-0577-ZZ

• Genuine SCHWANK OEM part ensures proper fit and reliable performance
• Precise 1.41″ W.C. setpoint calibrated for SCHWANK system requirements
• Safeguards equipment, building occupants, and property from flue-related hazards
• Supports compliance with safety and code requirements for gas-fired radiant heaters