Low Water Cut-Off Control Units (Fluid Handling) – Fire hazard (2014)
Check Your Product
According to the U.S. Consumer Product Safety Commission (CPSC)
Product
McDonnell & Miller Low Water Cut-Off control units for hot water or steam boilers
Brand
Fluid Handling LLC, of Morton Grove, Ill., a division of Xylem Inc.
Lot Codes / Batch Numbers
Not specified in CPSC notice. Check official source for details.
Product Images
Source: U.S. Consumer Product Safety Commission
Fluid Handling LLC, of Morton Grove, Ill., a division of Xylem Inc. is recalling McDonnell & Miller Low Water Cut-Off control units for hot water or steam boiler. The hazard is: The ground wire and probe wires could be incorrectly assembled in the units by the manufacturer, pos. Based on CPSC recall notice.
Summary derived from CPSC notice
The following details were not provided by CPSC: UPC codes.
Reason for Recall
As stated by CPSC
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.
Reported concern (CPSC)
The ground wire and probe wires could be incorrectly assembled in the units by the manufacturer, posing fire and explosion hazards.
Recommended Action
Per CPSC guidance
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.
Verify this information on the official source
For complete details and official instructions, check the U.S. Consumer Product Safety Commission (CPSC) directly.
View official CPSC recall noticePage updated: Jan 6, 2026