{"product_id":"mcdonnell-miller-157s-low-water-cut-off-pump-controller","title":"McDonnell \u0026 Miller 157S Low Water Cut-Off \/ Pump Controller","description":"\u003cp\u003eMcDonnell Miller, Series 157S Low Water Cut-Off\/Pump Controllers ( 173502 )\u003cbr\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0785\/5895\/3645\/files\/173502_Installation_Manual.pdf\"\u003eInstallation Manual\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0785\/5895\/3645\/files\/173502_Replacement_Parts.pdf\"\u003eReplacement Parts\u003c\/a\u003e\u003cbr\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0785\/5895\/3645\/files\/173502_Specs.pdf\"\u003eSpecification Sheet\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cdiv id=\"product-description\" class=\"productinfo ui-tabs-panel ui-widget-content ui-corner-bottom ui-accordion\"\u003e\n\u003cdiv class=\"column\"\u003e\n\u003cstrong\u003eFeatures and Benefits\u003c\/strong\u003e\n\u003cul class=\"continued\"\u003e\n\u003cli\u003eFor residential, commercial and industrial low or high\u003c\/li\u003e\n\u003cli\u003epressure boiler applications\u003c\/li\u003e\n\u003cli\u003eFor boilers of any steaming capacity\u003c\/li\u003e\n\u003cli\u003eMonel bellows provides corrosion resistance\u003c\/li\u003e\n\u003cli\u003eFloat chamber with integral water column provided\u003c\/li\u003e\n\u003cli\u003eSnap action for high temperature service\u003c\/li\u003e\n\u003cli\u003e1 Single pole, single throw switch for pump control\u003c\/li\u003e\n\u003cli\u003e1 Single pole, double throw switch for low water\u003c\/li\u003e\n\u003cli\u003ecut-off and alarm actuation\u003c\/li\u003e\n\u003cli\u003eOptional features\u003c\/li\u003e\n\u003cli\u003eManual reset\u003c\/li\u003e\n\u003cli\u003eIntegral conductance probes for additional levels and\u003c\/li\u003e\n\u003cli\u003egreater operating differential-Model 157S-RBP-MD\u003c\/li\u003e\n\u003cli\u003e1\" or 114\" NPT equalizing tappings\u003c\/li\u003e\n\u003cli\u003e12\" or 34\" NPT tappings for gauge glass\/tri-cock\u003c\/li\u003e\n\u003cli\u003einstallations\u003c\/li\u003e\n\u003cli\u003eBSPT threads\u003c\/li\u003e\n\u003cli\u003eMaximum pressure 150 psi (10.5 kg\/cm2)\u003c\/li\u003e\n\u003cli\u003eFor new electronic 150E Series see page 37\u003c\/li\u003e\n\u003cli\u003eModel 157S-MD\u003c\/li\u003e\n\u003cli\u003eMaximum differential operation\u003c\/li\u003e\n\u003cli\u003ePrevents nuisance burner shutdowns in low pressure\u003c\/li\u003e\n\u003cli\u003eapplications\u003c\/li\u003e\n\u003cli\u003eMaximum operating pressure 50 psi (3.5 kg\/\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"McDonnell \u0026 Miller","offers":[{"title":"Default Title","offer_id":47344175120557,"sku":"14278","price":1523.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/5895\/3645\/files\/157s.jpg?v=1787904406","url":"https:\/\/www.bostonheatingsupply.com\/products\/mcdonnell-miller-157s-low-water-cut-off-pump-controller","provider":"Boston Heating Supply","version":"1.0","type":"link"}