McDonnell Miller (172809) 150S-M-HD Head Mechanism with Manual Reset

Model 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.

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In you would like to return a product, you must first contact one of Customer Service Specialists for a Return Authorization. All return shipments must be prepaid by the customer. Made-to-order or custom products are non-returnable and non-refundable. Please note that there is a restocking fee for all returns.