@@Jacktoro44 the pump consists of a piston with two check valves and the boiler has a check valve as well. In order to fill a hot, pressurized boiler, the pump needs to be strong enough to overcome the boiler's internal pressure. These types of pumps do that with ease.
So wait, it has a pump to refill the boiler while it's running? How does that work, is there a one way valve?
@@Jacktoro44 the pump consists of a piston with two check valves and the boiler has a check valve as well. In order to fill a hot, pressurized boiler, the pump needs to be strong enough to overcome the boiler's internal pressure. These types of pumps do that with ease.