Rheem 491 Electric Hot Water System Review: Should You Buy It?

When it comes to dependable electric hot water systems for Aussie households, the Rheem 491 Series is a standout. It’s built for long-term durability, energy savings, and ease of installation—making it a trusted option in both new homes and retrofits. But is it the right fit for your home? In this deep dive, we cover performance, costs, installation, maintenance, and more.

Why Homeowners Choose the Rheem 491 Series

From 25L to 400L, the Rheem 491 range caters to every household size—from solo apartment dwellers to large families. Larger models (80L and up) are off-peak compatible, helping cut electricity bills while delivering reliable hot water day and night.

Key Benefits of the Rheem 491 Series

🔥 Range of Sizes

• 25L–50L: Great for small apartments or single occupants

• 80L–400L: Ideal for medium to large homes

• Off-peak electricity compatibility reduces ongoing running costs

🛠️ Easy Installation

• Dual-handed fittings = flexible plumbing options

• Designed with a common footprint for simple upgrades

• Built in Australia, tailored to local standards

💡 Pro tip: JR Gas & Water can retrofit most old systems with a Rheem 491 in under an hour!

Cost Efficiency & Energy Use

💰 Lower Running Costs

• Engineered for off-peak and time-of-use tariffs

• Excellent insulation = minimal heat loss

• Great pairing with solar power timers

⚡ Annual Cost Range

• Estimated running costs: $700–$925/year

• Smart meter-friendly = maximize savings with solar or tariff control

Durability & Long-Term Maintenance

Rheem’s 491 Series is known for lasting 15–20+ years with basic care. Maintenance is minimal, especially with JR's affordable servicing.

🛡️ Built to Last

• Ultranamel™ coating protects against internal corrosion

• Oversized sacrificial anode extends tank life

• Thermostat maintains consistent hot water

🧰 JR Gas & Water offers scheduled servicing across Brisbane & the Gold Coast.

Safety Features & Water Quality

• Temperature & pressure relief valve for overheat safety

• Enamel-lined tank ensures clean, fresh water

• Designed to comply with Australian hot water safety standards

Smart Meter Ready (but Not Smart Connected)

While not Wi-Fi or app-controlled, the 491 Series supports smart meters and programmable timers—ideal for:

• Off-peak optimization

• Solar sync scheduling

• Timed heating for night rates

Rheem’s Trusted Reputation

Rheem is one of Australia’s most well-known hot water brands, with over 80 years of industry experience.

🏆 Warranty Coverage

• 12-year cylinder warranty (on 80L+ units)

• 1-year parts & labour warranty

• Supported by JR Gas & Water’s expert installation

Is the Rheem 491 Series Right for You?

🏡 Best For:

• Small to large households needing tank sizes from 25L to 400L

• Homes with off-peak or solar tariff setups

• Anyone needing a quick, compatible upgrade with minimal plumbing changes

🚫 Not Ideal For:

• Smart home enthusiasts

• Customers wanting full solar hot water integration (consider heat pumps instead)

Final Verdict: Should You Buy It?

⭐ Rating: 4.5/5

✅ Pros:
✔ Excellent reliability and performance
✔ Easy installation and retrofit design
✔ Energy savings with off-peak compatibility
✔ 12-year warranty for peace of mind
✔ Built tough for Aussie homes

❌ Cons:
❌ No smart app features
❌ Not ideal for full solar integration

✅ Get It Installed By the Best

JR Gas & Water has been voted Best Plumbers & Best Home Care Store in 2023, 2024 & 2025, offering trusted Rheem installation services across Brisbane and the Gold Coast.

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