Reliance 650DORS water heater Parts

An electric hot water heater typically lasts 10 to 15 years, including the Reliance 650DORS, when it is installed correctly and maintained (especially flushing sediment and protecting the tank from corrosion). Hard water, heavy use, and skipped maintenance can shorten that lifespan.

Typical lifespan ranges (what to expect)

• Standard tank-style electric water heater: 10 to 15 years
• Well-maintained units in good water conditions: often closer to 15 years
• Units in hard-water areas with heavy sediment: often closer to 10 years

Heater type	Typical lifespan	What usually ends it
Electric tank water heater	10 to 15 years	Tank corrosion, leaks, sediment damage
Electric tankless water heater	20+ years	Scale buildup, electronics failure

What shortens the life of a Reliance 650DORS electric water heater

• Hard water and sediment that insulates the heating element and overheats the tank
• Anode rod worn out, allowing the steel tank to corrode faster
• Overheating from incorrect thermostat settings
• Frequent high-demand use (large household, long showers, high recovery cycles)
• Leaks at fittings or the tank seam that worsen over time

Maintenance that helps you reach the high end of the range

• Drain and flush the tank periodically; see how to drain the tank on an electric water heater video.
• Inspect and replace the anode rod when needed; the compatible part for this model is 2-way 100109624.
• If temperatures swing or recovery is slow, test the thermostats; common replacements include thermostat 100108683 (upper) and thermostat 100108421 (lower).

Why it matters

Once a tank begins corroding internally, repairs often become less cost-effective than replacement. Staying ahead of sediment and corrosion helps maintain efficiency, reduces “no hot water” complaints, and lowers the risk of a sudden leak.

Last updated: January 2026

For a Reliance 650DORS electric water heater, average labor to install a typical 50-gallon electric tank is usually $200 to $600. Costs can reach $800+ when the job needs electrical circuit work, plumbing rework, permits, or code upgrades.

What drives the labor price up or down

Labor pricing is mostly about site conditions, not the brand. Common cost drivers include:

• Electrical work: new 240V circuit, breaker, wiring, or disconnect
• Plumbing changes: new shutoff valve, pipe resizing, corrosion repairs, new flex lines
• Code items: expansion tank, seismic strapping, drain pan, T&P discharge piping
• Access: tight closet, attic, crawlspace, stairs, or limited clearance
• Removal/haul-away: old tank disposal and cleanup

Typical labor ranges (what you’ll see on estimates)

These are common labor-only ranges for a 50-gallon electric tank replacement.

Installation scenario	Typical labor range	Notes
Straight swap (same size, existing hookups)	$200 to $400	Fastest, least rework
Standard replacement with minor updates	$350 to $600	Common in older homes
Complex install (electrical/plumbing/code changes)	$600 to $800+	Can require multiple trades

Quick checklist before you schedule

We recommend confirming these items so the installer can quote accurately:

• Tank location and access (door width, stairs, closet clearance)
• Voltage and amperage (most are 240V; confirm breaker size)
• Any active leaks or corrosion at the shutoff or fittings
• Whether a drain pan and drain line are required
• Whether the T&P relief valve discharge line is properly routed

Why it matters

A low quote often assumes a “like-for-like” swap. If your Reliance 650DORS install needs electrical upgrades or plumbing corrections, labor can jump quickly, and those changes help prevent nuisance leaks, tripped breakers, and unsafe pressure conditions.

If you’re budgeting for repairs after installation (not install labor), common service parts for this model include the thermostat 100108683 and the thermostat 100108421. For general water-heater ownership and maintenance expectations, see water heater common questions.

Last updated: January 2026

A 50-gallon electric tank water heater typically costs $400 to $900 for the unit and about $1,100 to $2,000 installed (unit plus labor and common materials). For Reliance model 650DORS, we cannot confirm the exact tank form factor or dimensions from the model-specific information available, so pricing is best estimated by comparing standard 50-gallon electric replacements and your local install requirements.

Typical cost breakdown (unit vs. installed)

Cost item	Typical range	What it usually includes
Unit only (50-gallon electric)	$400 to $900	Standard tank, basic controls
Higher-end unit	$900 to $1,600+	Longer warranty, higher efficiency, added features
Installation	$700 to $1,100	Removal, hookup, basic fittings, startup
Typical installed total	$1,100 to $2,000	Common range for a straightforward swap

What changes the installed price most

• Local labor rates and permit requirements
• Whether plumbing shutoff, supply lines, or the drain pan need replacement
• Electrical updates (breaker, wiring, disconnect, whip)
• Code add-ons such as an expansion tank or seismic strapping (region-dependent)
• Access difficulty (tight closet, attic, stairs) and haul-away fees

Repair vs. replace considerations for 650DORS

If your Reliance 650DORS is otherwise in good shape, a repair can be far less than replacement when the issue is limited to common service parts.

• No hot water or inconsistent temperature: check thermostats and elements
• Slow recovery: often a heating element issue
• Overheating: thermostat calibration or failure

Helpful repair references:

• Water heater common questions
• Thermostat 100108683

Why it matters

A realistic installed-cost estimate helps you decide whether to repair (thermostat, heating element, wiring) or replace the tank, and it helps avoid surprise add-on charges during installation.

Last updated: January 2026