{"product_id":"mcdonnell-miller-114780-flow-switch-150-psi-1-5-15-gpm","title":"Mcdonnell Miller 114780 Flow Switch 150 Psi 1.5-15 Gpm","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe MCDONNELL MILLER 114780 is a general purpose liquid flow switch housed in a brass body and rated for up to 150 psi operating pressure. It monitors flow in liquid piping systems and triggers a switching action when flow reaches a set point, making it a reliable control component for pumping and HVAC hydronic applications. The switch covers a flow range of 1.5 to 15 GPM and connects via threaded NPT fittings. At 3.438 inches in overall length, it fits neatly into tight mechanical spaces. Licensed plumbers and HVAC technicians are the primary installers for this type of device.\u003c\/p\u003e\n\u003cp\u003eThis flow switch is suited for residential and light commercial liquid systems where flow confirmation or flow-loss protection is needed. Typical applications include chilled water loops, hot water heating systems, pump protection circuits, and general process liquid lines. The NEMA 1 enclosure rating makes it appropriate for indoor, non-condensing environments. It is not rated for outdoor or washdown service without additional protection.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eBrass housing for corrosion resistance in liquid service applications\u003c\/li\u003e\n  \u003cli\u003e150 psi maximum operating pressure rating\u003c\/li\u003e\n  \u003cli\u003eFlow range of 1.5 to 15 GPM with a defined flow set point\u003c\/li\u003e\n  \u003cli\u003eThreaded NPT connection style for standard pipe installations\u003c\/li\u003e\n  \u003cli\u003eNEMA 1 enclosure rating for protected indoor environments\u003c\/li\u003e\n  \u003cli\u003eCompact overall length of 3.438 inches for space-constrained installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation flow switch for general purpose liquid piping systems using standard NPT threaded connections.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or qualified HVAC technician in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off and depressurize the liquid system completely before threading the switch into the pipe. Apply thread sealant or PTFE tape to NPT threads per standard practice, and do not overtighten, as brass fittings are susceptible to thread damage. Verify flow direction matches the switch orientation before restoring system pressure.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Operating Pressure\u003c\/strong\u003e: 150 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow Range\u003c\/strong\u003e: 1.5 to 15 GPM\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Operating Temperature\u003c\/strong\u003e: 250 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHousing Material\u003c\/strong\u003e: Brass\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Style\u003c\/strong\u003e: Threaded NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNEMA Type\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.438 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: General Purpose Liquid\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.5 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MCDONNELL MILLER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 114780\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MCDONNELL \u0026 MILLER","offers":[{"title":"Default Title","offer_id":51543406739762,"sku":"114780","price":457.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/272798097.jpg?v=1785918058","url":"https:\/\/voomisupply.com\/products\/mcdonnell-miller-114780-flow-switch-150-psi-1-5-15-gpm","provider":"Voomi Supply","version":"1.0","type":"link"}