Check the listing for details. Quadra-fire Vacuum Switch SRV7000-531, AMP20097 NO HOSE. Condition: New. Listed at 28.90 USD. Quadrafire Pellet Stoves: 80010001100i1200 Classic Bay1200i Classic Bay InsertCastileCastile InsertContourEdge 60 Zero Clearance FireplaceMt VernonMt Vernon AEMt Vernon AE InsertMt Vernon E2Mt Vernon E2 InsertSanta FeSanta Fe-BSanta Fe Insert Heatilator Eco-Choice Pellet Stoves: PS35PS50CAB50 PelPro Pellet Stoves: PP60PP130 Quadra-Fire part # SRV7000-531 QuadraFire, Heatilator, PelPro & Pleasant Hearth Differential Vacuum Pressure Switch, AftermarketHighest Quality Aftermarket ReplacementDifferential Vacuum Pressure Switch AssemblyGuaranteed Newest Stock Inventory FunctionSenses air flow/restriction within the firebox, exhaust chamber, vent pipe and fuel hopper on select models. If proper air flow/draft is not met this switch will trip and not allow the auger motor to operate. This is a safety sensor.Part NumbersSRV7000-166, 812-3430, 812-1990, SRV7000-447, SRV7000-531, AMP-20097KHeatilator PelletCAB50PS35PS50PelProPP130PP60PP70PPC90TSC90Pleasant HearthPH35PSPH50CABPSPH50PSQuadra-Fire Pellet10001100i Insert1200 Freestanding1200i Insert800 Nova SAME DAY SHIPPING ON ORDERS PLACE BEFORE 2:00PM CST