Allows removal of empty cylinder for refill without interrupting propane supplyFor with dual propane tanks Automatically switches from primary to reserve tank when primary is empty Pairs well with our 48 Inch Plastic Hose, item 100383-48.Inlets are 1 or 4Inch SAE inverted flare and outlet is 3 or 8Inch NPT female pipe thread. Regulator is factory set at 11wc (water column). Rated for 190, 000 BTUThe Auto-Changeover LP Regulator allows you to hook up 2 Propane tanks. The regulator automatically switches over to the second tank once the first one runs out and . The indicator changes color to let you know when a tank has been depleted and needs to be refilled. The inlet is a 1 or 4Inch SAE inverted flare and the outlet is a 3 or 8Inch NPT female.Material: plasticandmetalcolour: As shownPackage Contents: 1 x Auto-Changeover LP RegulatorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.