1.   Also have the inlet valve seats recut at the same time.

2.   At the end of each line is an inlet valve with a spring- loaded closure gate and a power switch.

3.   After all the water is out, close the drain valve and open the inlet valve coming from the boiler.

4.   First turn off the burner, then close the water inlet valve to the boiler.

5.   Next, install the inlet valves.

6.   Next, plot locations for the inlet valves.

7.   Plugging the vacuum hose into an inlet valve will activate the unit.

8.   The inlet check valves also had significant damage.

9.   The inlet valve is wide open.

10.   Turn off the inlet valve and turn on the drain spigot again.