Resideo - Honeywell Home L4008E1305 Remote Bulb Aquastat Controller

Remote Bulb Aquastat Controller for boilers by Resideo Honeywell Home L4008E1305 provides precise boiler control and reliable temperature protection. This high-quality aquastat uses a 3/8 inch diameter x 2-7/8 inch copper sensing bulb matched to a 66 inch capillary, enabling flexible horizontal or vertical immersion in boilers, storage tanks, or radiant systems. The unit features a high-limit, manual-reset mechanism to prevent overheating and a robust design for long-term reliability. Built-in wiring options simplify installation and it carries UL and CSA safety approvals for peace of mind in professional boiler rooms.

• SPST contact configuration with break on temperature rise
• 3/4 inch conduit connection or screw terminal for versatile wiring
• UL and CSA listed for safety and compliance
• Horizontal or vertical immersion with 66" capillary and 3/8" sensing bulb
• Sensing bulb fill liquid: toluene or silicone oil
• Temperature range 100–240 °F; maximum rating 150 °F
• Electrical ratings: 8 A at 120 V AC / 5.1 A at 240 V AC (full load); 48 A at 120 V / 30.6 A at 240 V (locked rotor); 0.25 A at 0.25–12 V DC
• Pressure ratings: 200 PSI (capillary) and 255 PSI (immersion well)
• Applications: boiler and storage tank protection