The Tri-Star 300188 Fryer Natural Gas Safety Control Valve 7000 BMVR 3.5" WC is a precision fuel regulation component designed to maintain accurate gas pressure and ensure automatic shut-off safety in commercial fryers. Operating on a millivolt system with a preset 3.5-inch water column pressure rating, this combination valve works by sensing thermopile voltage and releasing fuel to t... https://partsfe.ca/gas-control-for-tri-star-part-300188