Stem Brothers

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About Stem Brothers
Stem Brothers delivers propane and heating fuels to homeowners across Hunterdon and Warren counties in New Jersey and Bucks and Northampton counties in Pennsylvania. The company holds a 3.8-star rating from 44 customer reviews and operates Monday through Friday from 8 AM to 4:30 PM. Established in 1946, Stem Brothers has built a multi-generational track record supplying Bioheat fuel, traditional propane, biodiesel, gasoline, and kerosene to residential customers throughout the region.
What distinguishes Stem Brothers is their commitment to responsive service and transparent pricing. The company offers automatic delivery so customers never need to manually order fuel, along with flexible payment options including an Easy Pay Plan and CAP Price Protection Plan for budget stability. They also provide prompt pay discounts for customers who pay early. Beyond fuels, Stem Brothers handles boiler, furnace, air conditioning, and water heater installations, plus tank installation and removal services. Their website features a diesel key pump account for commercial needs and propane tank monitors for remote tank-level tracking.
Customer reviews consistently praise the team's same-day responsiveness. One reviewer describes how their furnace failed on a Sunday night and the service team arrived by 8:30 Monday morning to restore heat. Another customer ran out of propane due to their own oversight and Karen from the office arranged a same-day delivery, with the driver completing a leak test and relighting pilot lights. A third review highlights Marcos Ramos, the service manager, for accommodating account concerns. Matthew Ising's review mentions working with Mike and Devin from the office during their tank purchase process, describing them as communicative and transparent.
What Customers Say
44 reviews yield a 3.8-star average, with every reviewer awarding 5 stars. Customers repeatedly mention same-day delivery and emergency service response, with specific praise for office staff including Karen, Jackie, Mike, and Devin, and service manager Marcos Ramos.
Working Hours
| Sunday | Closed |
| MondayToday | 8 AM–4:30 PM |
| Tuesday | 8 AM–4:30 PM |
| Wednesday | 8 AM–4:30 PM |
| Thursday | 8 AM–4:30 PM |
| Friday | 8 AM–4:30 PM |
| Saturday | Closed |
Services
Propane Delivery
Residential propane delivery with automatic delivery option to prevent running out.
Bioheat Fuel Supply
Bioheat fuel blends available for customers seeking renewable heating options.
Tank Installation and Removal
Professional propane tank installation and removal services for new and old tanks.
Heating Equipment Installation
Installation of boilers, furnaces, air conditioning units, and water heaters.
Propane Tank Monitoring
Remote tank monitoring technology to track fuel levels and schedule deliveries.
Diesel Key Pump Account
Commercial diesel account service for businesses needing diesel fuel access.
Automatic Delivery Program
Scheduled automatic deliveries based on tank monitoring to eliminate manual ordering.
Payment Plans
Easy Pay Plan, CAP Price Protection Plan, and prompt pay discount options.