{"product_id":"mcdonnell-miller-129302-42s-pump-controller-and-low-water-cut-off","title":"McDonnell \u0026 Miller 129302 42S Pump Controller and Low Water Cut-Off","description":"\u003cp\u003eMaintain optimal boiler safety and automated water level management with the \u003cstrong\u003eMcDonnell \u0026amp; Miller 129302\u003c\/strong\u003e, a high-performance \u003cstrong\u003e42S\u003c\/strong\u003e pump controller and low water cut-off. This robust control device serves as a critical interface between your water feeder and the boiler, ensuring that pump operations are cycled based on precise internal water levels to prevent dry firing and damage.\u003c\/p\u003e\u003cp\u003eThe unit utilizes a proven mechanical float assembly that responds directly to changes in water level, triggering the controller to activate or deactivate the boiler feed pump as required. This reliable, heavy-duty mechanism is designed for industrial and commercial steam heating systems where consistent fluid management and system longevity are paramount.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Sensing:\u003c\/strong\u003e Reliable mechanical float activation ensures accurate water level monitoring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Functionality:\u003c\/strong\u003e Integrated pump control and secondary low water cut-off protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Durability:\u003c\/strong\u003e Robust construction engineered for long-term reliability in high-pressure steam environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Primarily utilized in commercial steam boiler applications for reliable feed pump management and boiler safety, preventing damage caused by low water conditions.\u003c\/p\u003e","brand":"McDonnell \u0026 Miller","offers":[{"title":"Default Title","offer_id":43124908097630,"sku":"129302","price":1134.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/129302_image_dabc710b-d5f8-44b8-bbe8-5f0a52e8b3f8.png?v=1786035456","url":"https:\/\/nationalboilersupply.com\/products\/mcdonnell-miller-129302-42s-pump-controller-and-low-water-cut-off","provider":"National Boiler Supply","version":"1.0","type":"link"}