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The drain cocks are scaled from prototype Oakadee drain cocks and operate the same. Steam pressure from a cab valve will close the drain cocks. When the control valve is closed, steam pressure from the cylinders will open the drain cocks. All valves are reversible to provide easy mounting on your locomotive. Banjo bolts that attach the bodies to the cylinder are 1/8-27 NPT or 5/16-27 MTP thread. Threads on the steam control line are 1/8-56 MTP.
7-1/4" or 7-1/2" Ready to Run