McDonnell Miller (172809) 150S-M-HD Head Mechanism with Manual ResetModel 150S M HD replacement head mechanism with snap action switch assembly with manual reset repairs Series 150S M and Series 157S M low water cut off pump controllers for steam boilers. Replacement head mechanisms can be installed without disturbing existing equalizing connections or disassembly of components, making repair simple and easy. Part Number: 172809 Model: 150S M HD Details: Equipped with manual reset Head mechanism only For commercial

Model #: 144400

Model number 42S-HD is a head mechanism for model number 42-S controls

As room temperature drops

high volume blowers

Product Features For use on hot water boilers

under-heating and wide temperature swings can now be minimized

The Macon valve can be equipped with any wide variety of Macon operators

Maximum operating pressure: 150 PSI (10

single throw switch for pump control

Thermolec B-30

Part Number: 171702

The Model NBF-33 part number 103351LF is permanently lubricated with a 1/15 HP