Johnson's New Handy Manual on Plumbing, Heating, Ventilating and Mechanical Refrigeration #272142

If direct feed from pump N o. 1 to boiler is wanted proceed as follows: Close valves G. And usw'qves F. And M. The flow will open check valve E and close check valve E; E. If direct feed froni'pump'o. 2 to boiler' is wanted close' valves Fiia'nd Bataan open valves G. And M. Check valves E. And E.' B. Have the same action as whentpu'mp Nsdi 1 isiused.