The Reliance 40 gal 35,500 BTU Propane Water Heater is a dependable, residential storage heater built to deliver hot water when your family needs it most. With a solid 40-gallon tank and a robust 35,500 BTU input, this unit is designed to recover quickly after back-to-back showers, dishwashing sessions, and laundry cycles—keeping you in hot water without long waits.
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Tank capacity: 40 gallons
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BTU input: 35,500 BTU/hr
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Fuel: Propane
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Type: Storage water heater (not tankless)
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Burner: Low NOx burner for cleaner combustion
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Water connections: Top inlet/outlet, 3/4" diameter
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Gas connection size: 1/2"
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Venting: Compatible with 3" or 4" vent diameter
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Maximum elevation: 10,100 ft
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Maximum working pressure: 150 psi
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Temperature range: Capacity to supply hot water across a range from 55°F inbound water up to 150°F
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Temperature/Pressure Relief Valve: Yes
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Water connection location: Top
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Dimensions: 62" tall, 20" diameter
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Warranty: 6-year
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CSA Listed: Yes
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Energy Star Certified: No
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Energy/Emissions: Low NOx burner reduces emissions
Why this Reliance water heater stands out
Unlike smaller or tankless options, this 40-gallon propane heater provides a reliable, steady supply of hot water with a proven recovery rate optimal for family homes. The top-mount water connections simplify retrofits and new installations, while its 3"–4" vent compatibility gives installers flexibility in choosing the right venting path. The unit’s low NOx burner supports cleaner combustion, and the CSA listing adds an extra layer of safety assurance for residential use.
Ideal for who and where
This heater is designed for residential settings where hot water demand is steady but can spike during peak usage. It’s particularly well-suited for households with multiple bathrooms, frequent laundry cycles, or mid-sized families who want a reliable hot water reserve. The high elevation compatibility (up to 10,100 feet) makes it a practical choice for homes in mountainous regions where some heaters struggle to perform at altitude.
Use cases and practical benefits
- Simultaneous hot water for several showers, faucets, and the dishwasher without noticeable temperature drops
- Stable performance in regions with cooler incoming water temperatures, thanks to a 40-gallon storage capacity
- Flexible installation options with top water connections and venting adaptability
- Long-term reliability backed by a 6-year warranty and CSA safety certification
Installation and care tips
Plan for a standard 1/2" gas supply and a 3/4" water line, with ventilation that accommodates a 3" or 4" exhaust. Regular inspection of the Temperature and Pressure Relief Valve and adherence to local code requirements will help maintain performance and safety. For optimal performance, ensure the unit has adequate clearance and is installed in a space that supports its 62" height and 20" diameter footprint.
