Mars 33939 Low Pressure Control, 50/90

About the Mars 33939 Low Pressure Control, 50/90

Get a discount on the Mars 33939 Low Pressure Control, 50/90 and update your kitchen with a popular collection. A pressure switch senses negative pressure in a furnace and shuts it down as a safety measure against harmful fumes and gas leaks. It's easy to replace. Mars is an industry leader because of their quality HVAC solutions.