Allows removal of empty cylinder for refill without interrupting propane supply For 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 1/4Inch SAE inverted flare and outlet is 3/8Inch NPT female pipe thread. Regulator is factory set at 11wc (water column). Rated for 190, 000 BTU The 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 1/4Inch SAE inverted flare and the outlet is a 3/8Inch NPT female. Material: plastic+metal colour: As shown Package Contents: 1 x Auto-Changeover LP Regulator Only 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.