{"product_id":"mcdonnell-miller-132800-series-47-2-combination-water-feeder-and-low-water-cut-off","title":"McDonnell \u0026 Miller 132800 Series 47-2 Combination Water Feeder and Low Water Cut-Off","description":"\u003cp\u003eProtect your steam boiler from dry-firing and maintain optimal water levels with the \u003cstrong\u003eMcDonnell \u0026amp; Miller 132800\u003c\/strong\u003e Series \u003cstrong\u003e47-2\u003c\/strong\u003e. This integrated unit serves as a primary low-water cut-off and automatic water feeder, providing essential safety and operational reliability for residential and light commercial steam heating systems. By automatically replenishing water when levels drop, it prevents critical damage to the heat exchanger and ensures continuous, efficient system performance.\u003c\/p\u003e\u003cp\u003eThe unit functions through a float-operated mechanism that detects changes in water surface level. When the water level reaches the designated low point, the mechanical feeder valve initiates an automatic replenishment cycle. Simultaneously, the integrated switch provides a positive electrical shut-off to the burner circuit if water levels fall below the critical threshold, adding a secondary layer of protection against dry-firing.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Regulation:\u003c\/strong\u003e Ensures consistent water level maintenance to prevent boiler dry-firing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Integration:\u003c\/strong\u003e Features a built-in low water cut-off switch for rapid burner power termination.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Construction:\u003c\/strong\u003e Engineered for durability in demanding high-temperature steam environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Designed for use on steam heating boilers with low-pressure applications. Ideal for residential or light commercial installations requiring automated water management and integrated dry-fire protection.\u003c\/p\u003e","brand":"McDonnell \u0026 Miller","offers":[{"title":"Default Title","offer_id":43125813313630,"sku":"132800","price":1448.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/132800_image_2c94a957-f142-4041-8ade-34b9476575e3.png?v=1786037997","url":"https:\/\/nationalboilersupply.com\/products\/mcdonnell-miller-132800-series-47-2-combination-water-feeder-and-low-water-cut-off","provider":"National Boiler Supply","version":"1.0","type":"link"}