The lower check valve closes and the pressure can only upwardly through thethe boiler is connected to the escape. The feed water pump is a very visually appealing extension for each steam plant and also significantly increased the functionality.
Microcosm M11 Electric Steam Boiler Feed Pump
M11 Electric Steam Boiler Feed Pump Brass & Stainless for Live Steam Engine
M11 Electric Steam Boiler Feed Pump Copper Stainless Steel 6V
M11 Microcosm Electric Steam Boiler Feed Pump Brass & Stainless Steel
Microcosm M11 6V Electric Feedwater Pump for Steam Engine Boilers (With Bracket)