How to Set Up a Boiler Injector

The internal diameter of all connecting pipes should be the same or greater than the diameter of the hole in the corresponding part of the injector. If water appears at the overflow close the supply valve and open it again giving it just the proper amount of turn. Set the injector as low as possible as it works best with smallest possible lift. Blast and blow off devices are used for blowing sediment out of the bottom of a boiler or blowing scum off the top of the water to prevent foaming. A boiler should never be blown out at high pressure as there is great danger of injuring it. Better to let the boiler cool off somewhat before blowing off.