The MARS 12789 is a heavy-duty 45/7

or 5H126 models

Does this pump come with 2-inch flanges

OEM Compatibility: Precision-manufactured as a Heil Quaker 1174694 replacement

What happens if I use a transformer with a lower VA rating

Nordyne 632595 Pressure Switch 326058-757 The MARS 12789 is aProfessionals know that a faulty inducer system can sideline a furnace right when it is needed most. The Nordyne 632595 Pressure Switch is the go to OEM solution for maintaining precise safety limits in residential and mobile home units. This furnace draft pressure switch is factory calibrated to handle a specific setpoint of . 65 . 28 inches of water column, ensuring your inducer motor is moving air at the exact volume required for safe combustion.