{"product_id":"viessmann-7856786-flow-switch","title":"Viessmann 7856786 Flow Switch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VIESSMANN 7856786 is a flow switch designed to detect liquid movement within a hydronic or heating system. Flow switches of this type serve as a safety interlock, confirming that adequate water flow is present before allowing a boiler or heating appliance to fire. The 7856786 is identified by its type 325 M 600 designation and is suited for installation by licensed HVAC technicians or plumbers working on commercial or residential heating systems. It provides a simple, reliable signal to the system controller based on flow status.\u003c\/p\u003e\n\u003cp\u003eThis flow switch is intended for use in hydronic heating applications where water flow verification is required as part of safe system operation. The part description references compatibility with B1XE series appliances rated at 150 to 199 thousand BTU\/h output, making it appropriate for mid-range boiler installations. It is typically installed in the supply or return piping to monitor flow before the burner sequence is permitted to proceed.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eFlow detection designed to serve as a safety interlock in hydronic heating systems\u003c\/li\u003e\n  \u003cli\u003eType 325 M 600 designation for precise OEM identification\u003c\/li\u003e\n  \u003cli\u003eCompatible with B1XE series appliance range based on supplier description\u003c\/li\u003e\n  \u003cli\u003eProvides flow status signal to system controller or burner management circuit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eReferenced in supplier data for use with B1XE series appliances in the 150 to 199 thousand BTU\/h range. No additional specific model numbers were provided in the product data. Verify compatibility with the OEM documentation for your specific VIESSMANN appliance before ordering.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or HVAC technician familiar with hydronic piping systems. Shut off system power and isolate water pressure before removing or installing any flow switch. Follow local mechanical codes and the appliance manufacturer wiring instructions when connecting the switch to the control circuit. Confirm proper flow direction orientation against the arrow or marking on the switch body during installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Type\u003c\/strong\u003e: Flow Switch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel Designation\u003c\/strong\u003e: Type 325 M 600\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Range\u003c\/strong\u003e: B1XE 150\/199\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: VIESSMANN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 7856786\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VIESSMANN","offers":[{"title":"Default Title","offer_id":51268075422002,"sku":"7856786","price":196.23,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308912152.jpg?v=1780698423","url":"https:\/\/voomisupply.com\/products\/viessmann-7856786-flow-switch","provider":"Voomi Supply","version":"1.0","type":"link"}