Installed new Weil-Mclane boiler. Adapted to gas line. Installed 4 new Honeywell thermostat. Installed new zone control installed new switch and low voltage wire from zone board to previous taco zone valve installed new auto fill an air separator, also installed new expansion tank. And adapted to supply and return piping. Reused flu pipe. During start up propane gas valve is faulty. Paul will need to order a new one and schedule a day to come back.