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Reliance 40 gal 36,000 BTU Propane Water Heater

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Experience dependable, on-demand hot water with the Reliance 40 gal 36,000 BTU Propane Water Heater — a residential gas heater engineered to deliver steady warmth when your family…

Reliance MPN 6-40-PBCS
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Typical store price: low $670.99, average $789.99
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About Product Overview

Experience dependable, on-demand hot water with the Reliance 40 gal 36,000 BTU Propane Water Heater — a residential gas heater engineered to deliver steady warmth when your family needs it most. With a robust 36,000 BTU input and a full 40-gallon tank, this unit provides rapid recovery and multiple showers or laundry cycles without a long wait for hot water.

Key features that set this unit apart

  • 40-gallon tank for longer hot water availability between refills, ideal for 2-bath homes or households with higher hot water demand.
  • 36,000 BTU input delivers quick hot water recovery, helping you power through busy mornings and busy evenings without compromise.
  • Gas-powered, propane operation with no electrical power required for standard operation, simplifying installation in off-grid or remodeled spaces.
  • Top water connections at 3/4" diameter simplify plumbing layouts and retrofits in tighter spaces.
  • Vent compatibility accepts a 3" or 4" vent, offering flexible installation options to fit existing venting or new layouts.
  • Compact footprint with a 22" diameter and 51-1/2" height helps fit into utility closets and utility rooms without compromising room flow.
  • Elevation readiness tested to perform up to 10,100 feet above sea level, making it suitable for mountain homes and hill country cabins.
  • Safety features include a Temperature Pressure Relief Valve for protective relief, plus a Low NOx burner for cleaner emissions.
  • CSA listed product ensuring compliance with safety and performance standards.
  • Warranty coverage of 6 years provides long-term peace of mind.
  • Residential use configuration designed for homes, not commercial facilities.
  • Max/Min temperature range actively heats water from 55°F to a practical 150°F, letting you tailor comfort to your family’s needs.

Why this propane water heater is the right choice for your home

When you need dependable hot water without the complexity of electric components, this Reliance model stands out. The 40-gallon capacity minimizes cold-water interruptions during morning routines, while the 36,000 BTU burner ensures rapid recovery after high-demand bursts—think back-to-back showers or running multiple hot appliances in succession. The top-mount water connections make retrofits easier in tight spaces, and the flexible venting (3" or 4") accommodates a range of existing vent configurations.

Ideal for

  • Single-family homes, especially those with two bathrooms or higher simultaneous hot-water needs.
  • Cabins or rural residences where propane is the primary energy source and electrical access is limited or prioritized elsewhere.
  • Renovations where compact installation space and versatile venting are important.

Practical considerations and tips

Plan for a closet or alcove with adequate clearances and a 22" diameter footprint, plus room for venting and service access. Ensure the 1/2" gas supply is prepared and that the 3/4" water lines are routed to and from the unit with proper shutoffs for easy maintenance. Schedule periodic checks of the Temperature Pressure Relief Valve and routine flushing to maintain performance over years of daily use. This unit’s non-Energy Star status reflects a focus on robust residential performance and reliability.

With the Reliance 40 gal 36,000 BTU Propane Water Heater, you gain a dependable hot-water system built for real family life—efficient, durable, and designed to keep up with your daily routines.

The Details Specifications

Brand Reliance
SKU 4582557
UPC 091193005729
Unit 0
Case Pack Quantity 1 per case
Retail Unit Quantity 1
Unit of Measure 0 0
Dimensions (L × W × H) 26 × 23 × 52
Weight 135 lbs
Cubic Feet 18.1684 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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