McDonnell & Miller Low Water Cut-Off control units for hot water or steam boilers
Class I - DangerousWhat Should You Do?
- Check if you have this product: (About 1,200)
- Do not eat it: Even if it looks and smells fine, do not consume this product.
- Throw it away or return it: You can return the product to the store for a full refund.
- Seek medical attention if needed: If you've consumed this product and feel unwell, contact your doctor immediately.
- Report problems: Report any issues to the FDA's Safety Reporting Portal.
⚠️ Emergency: If you experience severe symptoms after consuming this product, call 911 or Poison Control at 1-800-222-1222.
Recall Details
- Company:
- Fluid Handling LLC, of Morton Grove, Ill., a division of Xylem Inc.
- Reason for Recall:
- The ground wire and probe wires could be incorrectly assembled in the units by the manufacturer, posing fire and explosion hazards.
- Classification:
- Class I - Dangerous
Dangerous or defective products that predictably could cause serious health problems or death.
- Status:
- ongoing
- Hazard:
- The ground wire and probe wires could be incorrectly assembled in the units by the manufacturer, posing fire and explosion hazards.
- Remedy:
- Contact Fluid Handling/Xylem for a free inspection, repair or free installation of a replacement low water cut-off unit. The firm is contacting purchasers directly.
Product Images

Product Information
Full Description:
This recall involves McDonnell and Miller series 750 Low Water Cut-Off control units, which in connection with a water level sensor, are used as a primary or secondary safety control on hot water or steam boilers to signal the boiler to provide protection in low water conditions. The unit is mounted on the outside of a boiler, generally near the boiler's main electrical panel. They are black and measure about 6 inches high x 5 inches wide x 2 1/2 inches deep. The units have a green LED "On" light, a red LED "Low Water" light and test and manual reset buttons on the top. "McDonnell and Miller," "Guard Dog," "Low Water Cut-Off" and model numbers 750-MT-120, 751-MT-120, 751P-MT-120 or 752P-MT-24 are printed on a white label on the outside of the unit. Date codes G41 or H41 are inked on the inside back plate.
Product Codes/Lot Numbers:
(About 1,200)
Official Source
Always verify recall information with the official CPSC source:
View on CPSC.govCPSC Recall Number: 15703