Common Mistakes to Avoid in Water Heater Installation

Installing a water heater might seem simple, but small mistakes can lead to major issues. Poor placement, incorrect connections, and skipping important steps can result in higher energy costs, safety hazards, and expensive repairs.

A properly installed water heater works efficiently, provides steady hot water, and lasts longer. Whether gas or electric, making the right choices during installation helps prevent energy waste, safety risks, and costly repairs.

At Tom’s Plumbing and Drain Service, LLC, we install water heaters the right way from the start. If you’re unsure about your setup or want a professional to handle the job, contact us today. Our team is ready to help ensure your water heater is installed correctly and safely.

Common Water Heater Installation Mistakes

Installing a water heater involves more than just connecting pipes. Overlooking details can cause leaks, system failures, and even void warranties. Understanding common mistakes helps homeowners and professionals make better choices.

1. Ignoring Local Codes and Permits

Every city or town has rules for water heater installation, covering ventilation, pressure relief, and safety measures. Skipping these requirements can lead to safety risks, fines, or compliance issues.

Before installing a unit, check local building codes. Some areas require permits or inspections to confirm that the installation meets regulations. Following these rules protects your home and prevents future problems.

2. Choosing the Wrong Water Heater

Picking the right water heater is important. A unit that’s too small won’t provide enough hot water, while an oversized one wastes energy.

Consider these factors:

• Household size: A small tank may not keep up with a large family’s needs.
• Tank vs. tankless: Tankless models save space and provide continuous hot water, but larger homes may need multiple units.
• Energy efficiency: Choosing an energy-efficient model helps lower utility bills.

The right water heater ensures reliable hot water without unnecessary energy waste.

3. Poor Placement and Ventilation

Water heaters must be installed in a safe, open area with proper ventilation. Placing a unit in a cramped or unventilated space can cause overheating, gas buildup, or fire hazards.

Gas water heaters require venting to remove carbon monoxide. The installation area should allow for easy maintenance and have enough airflow to keep the system running safely.

4. Incorrect Sizing

Water heater size affects performance and efficiency. A unit that’s too small won’t supply enough hot water, while an oversized model increases energy costs.

Traditional tank heaters must match household water usage. Tankless heaters provide unlimited hot water but may need additional units for high-demand homes. Selecting the right size ensures efficiency and comfort.

5. Skipping Pre-Installation Checks

Before installing a new water heater, inspect all connections, valves, and venting systems. Skipping this step can lead to leaks, pressure buildup, or other system failures.

A proper inspection includes:

• Checking vent pipes for blockages
• Inspecting connections for leaks
• Confirming the drain valve works for future maintenance

Addressing potential issues before water heater installation prevents major problems later.

6. Incorrect Pressure Relief Valve Installation

The pressure relief valve prevents excess pressure inside the tank. If installed incorrectly, it may fail to release pressure, increasing the risk of a tank rupture.

To avoid this:

• Install the valve securely in the correct location.
• Connect the discharge pipe properly to direct excess water safely.
• Check the valve regularly to confirm it works properly.

7. Using Low-Quality Materials and Loose Connections

Leaks and inefficiency often result from using poor materials or failing to secure connections properly.

Common mistakes include:

• Loose fittings that cause leaks over time
• Over-tightened connections that can crack pipes
• Corrosion from mixing metals, such as copper and galvanized steel

Using high-quality materials and tightening connections correctly ensures a long-lasting installation.

8. Forgetting Expansion Tanks and Insulation

Expansion tanks help regulate water pressure in a closed plumbing system. Without one, pipes and fittings experience extra stress, which can cause leaks over time.

Insulating the water heater and pipes also helps by:

• Reducing heat loss
• Lowering energy costs
• Keeping water hot longer

These small upgrades improve system performance and efficiency.

9. Overlooking Energy Efficiency

Poor installation can lead to wasted energy and higher bills. To get the most from your water heater:

• Choose an Energy Star-certified model to cut energy use.
• Insulate the heater and pipes to reduce heat loss.
• Make sure gas models have proper venting for better efficiency.

A well-installed system saves money and provides consistent hot water.

Why Professional Installation Matters

Installing a water heater might seem like an easy project, but mistakes can be expensive. Many failures happen because of improper setup, leading to energy waste, leaks, or even safety risks.

The Risks of Poor Installation

• Carbon monoxide buildup: Gas heaters must be properly vented to prevent dangerous gas accumulation.
• Leaks and water damage: Poorly sealed connections can cause leaks, leading to mold and structural damage.
• Fire hazards: Placing a heater too close to flammable materials increases fire risks.

The Cost of a Bad Installation

A poorly installed water heater won’t operate efficiently, which can lead to:

• Higher energy bills
• Frequent repairs
• A shorter system lifespan

A DIY installation mistake can quickly turn into an expensive fix. Hiring a professional prevents these problems and keeps your water heater working correctly.

Let Tom’s Plumbing and Drain Service, LLC Handle Your Water Heater Installation

A water heater must be the right size, securely connected, and properly vented. Even small mistakes can lead to leaks, wasted energy, and costly repairs.

At Tom’s Plumbing and Drain Service, LLC, we handle the entire installation process with care. Whether you’re replacing an old unit or installing a new one, we do the job right.

Don’t take risks—call us today for expert water heater installation that keeps your home safe and running efficiently.