Suburban Automatic Changeover Regulator With Shut Off Valve, 1/4" Inverted Flare x 3/8" Female NPT, 160,000 BTUManage two propane tanks automatically with the Suburban LP R924 Single Stage Automatic Changeover Propane Regulator. This 160,000 BTU hr regulator automatically switches between two propane tanks drawing from the primary tank until it's empty, then seamlessly switching to the reserve tank without interrupting your propane supply. The essential regulator for RVs with dual tank setups where you don't want to be stuck without propane mid cook or mid