I design the new device to solve those drain problem. I utilize the pressure drop between the primary steam pressure and secondary pressure. I add the extra pipe to create the primary pressure. This extra pipe is named John's pipe. This effect pressure drop due to the John's pipe is named John's effect like diagram 2. Because of this John's effect, the pitch is not needed to drain the water out of the system. We can utilize the hot water heating baseboard with adding the John's pipe and air valve like diagram 2. The length of the baseboard can be varied from 2 feet to 16 feet. The air valve is need here to push the air out of the system. The added pipe can be varied from ⅜″ to ¾″ in diameter.
We also propose to improve the old cast iron steam radiator (see diagram 3) by adding John's pipe see diagram 4. The old cast iron radiator is so heavy, not pretty and space wasted. I prefer the hot water baseboard heating. By adding the John's effect, we can convert hot water baseboard heating equipment into steam baseboard heating equipment.
2. It is light. It is very easy to install. Less man power.
5. We can mount the baseboard heating along the wall. It saves the space.
The new design needs no pitch, and can be mounted along the wall and save the needed space for the modern house.
The old cast iron radiator needs 6% pitch to drain the water. See diagram 3. The old cast iron radiator can be improved with John's pipe and gets John's effect, and needs no pitch to drain water. See diagram 4.