Resideo L8124L1011/U Triple Aquastat RelayResideo L8124L1011/U Triple Aquastat Relay
Resideo L8124L1011/U Triple Aquastat Relay
ResideoSKU: 64040

Resideo L8124L1011/U Triple Aquastat Relay

$373.05
Low Stock (2)

The L8124L1011/U Triple Aquastat Relay provides high-limit, low-limit, and circulator relay control for hydronic boiler systems. High-limit range is 130-240F with a 10F fixed differential; low-limit range is 110-220F with 10-25F adjustable differential. Rated 120 VAC; horizontal mount with 1-1/2 in. insulation depth. Features Micro Switch snap-acting switch. Mounts directly to boiler. Rated 0-95% non-condensing humidity. Requires professional installation by a licensed HVAC or plumbing technician.

Shipping policy

Orders placed by 2:00pm EST will ship same day, except on holidays.

More Details

Product overview
  • Triple-function control - high limit, low limit, and circulator relay in one immersion unit
  • High-limit range: 130-240F with 10F fixed differential
  • Low-limit range: 110-220F adjustable with 10-25F adjustable differential
  • 120 VAC supply voltage; horizontal mount only
  • Insulation depth: 1-1/2 in.
  • Diaphragm powerhead and Micro Switch assembly for temperature response
  • Mounts directly to boiler; supports multizone control with separate circulator and R845 Relay per zone
  • Requires 24 VAC thermostat with heat anticipator set at 0.2A
Specifications
Manufacturer Part Number L8124L1011/U
UPC 85267055055
Overall Dimensions 5-3/8 in H x 4-1/16 in W x 2-11/16 in D
Material n/a
Domestic or Import Domestic
End Style n/a
Type Triple
ADA Compliance n/a
Warning Professional installation required
Standards and Approvals UL Listed (models with well): File No. MP466, Guide No. MBPR | UL Component Recognized (models without well): File No. MP466, Guide No. MBPR2 | CSA Certified: File No. LR1620, Guide No. 400-E-O
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Delivery & Returns

Orders will ship same day if received by 2pm EST.

Upcoming holiday closures: May 25, 2026

All returns are inspected on receipt; credit is issued after condition is confirmed. Credit is issued only for items returned in original, saleable condition after inspection.

FINAL SALE ITEMS ARE NOT ELIGIBLE FOR RETURNS OR EXCHANGES.

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