Resideo - Honeywell Home L8124A1015 Aquastat Relay

L8124A1015 Aquastat Relay by Resideo, a Honeywell Home product, delivers precise temperature control for hydronic heating systems. Designed for direct vertical well immersion, it uses a 3/8" diameter x 2-7/8" length sensing element and supports triple high/low limit control to protect boilers and circulators. This rugged unit blends reliable sensing with easy installation for modern radiant and baseboard setups.

With flexible settings and durable construction, the L8124A1015 is UL/CSA approved and supports standard conduit connections with quick-connect or screw terminals. It is ideal for residential and light commercial hydronic heat, delivering dependable performance in challenging environments.

• Sensing element: 3/8" Ø x 2-7/8" vertical well
• Temperature ranges: High 130–240°F; Low 110–220°F
• Max ratings: Switch 150°F; Sensing element 265°F
• Contacts: SPST/SPDT; 7.4A @120V; 3.7A @240V
• Load: 44.4A @120V; 22.2A @240V locked rotor
• Connection: 1/2" conduit; quick-connect or screw
• Application: Hydronic heating systems (boilers, circulators)
• Approvals: UL, CSA
• Dimensions: 4-3/8"W x 3-1/16"D x 6-1/8"H
• Environment: 0–95% RH non-condensing