Name of product:
McDonnell & Miller Low Water Cut-Off control units for hot water or steam boilers
The ground wire and probe wires could be incorrectly assembled in the units by the manufacturer, posing fire and explosion hazards.
Recall date:
October 9, 2014
About 1,200
Consumer Contact:

Fluid Handling/Xylem toll-free at (855) 750-7322 Monday through Friday from 9 a.m. to 5 p.m. CT or online at and click on Recall Notice for more information.

Recall Details


This recall involves McDonnell & 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 & 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.


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.


None reported

Distributed By:

Wholesale plumbing product distributors to plumbing suppliers from July 2014 through August 2014 for between $80 and $125.


Fluid Handling LLC, of Morton Grove, Ill., a division of Xylem Inc.


Fluid Handling LLC, of Morton Grove, Ill., a division of Xylem Inc.

Manufactured In:
United States
Recall number: