The Ultimate Guide to Water Heater Installation

A water heater is an essential appliance in modern homes, supplying hot water for showers, cleaning, and cooking. From traditional tank-based units to modern tankless water heaters, they ensure a steady supply of hot water whenever needed. 

Proper water heater installation is crucial for ensuring safety and efficiency. This guide covers the installation process and answers some common questions about costs and whether homeowners can tackle the job themselves.

Professional Water Heater Installation: Step-by-Step Process

Tank-based Installation

Gas Water Heaters

1. Assess and Prepare: The plumber evaluates the existing water heater tank and ensures proper gas line and ventilation. They shut off the water, gas, and electrical supply to prevent hazards.
2. Drain and Remove Old Heater: Water is drained from the existing tank, and the gas line is disconnected. The old unit is safely removed.
3. Install New Heater: The new unit is positioned, making sure it’s on a stable, level surface. The gas line is connected, and venting pipes are installed to expel exhaust gasses.
4. Connect Water Lines and Test: New water lines are connected, and the plumber fills the tank. The gas supply is turned on, and the pilot light is lit. Water temperature settings are adjusted, and all connections in your new gas water heater are inspected for leaks.

Electric Water Heaters  

1. Shut Off Utilities and Drain the Tank: The power to the existing unit is turned off, and the water supply is shut. The old heater is drained and disconnected from the water electrical lines.
2. Remove and Replace Unit: The old heater is taken out, and the new one is set in place. Electrical connections are carefully inspected to ensure compatibility.
3. Connect Plumbing and Electrical: Water lines are connected, and the electrical supply is wired to the new unit. Safety checks are made to prevent electrical hazards.
4. Fill and Inspect: The electric water heater tank is refilled, the power is restored, and a final inspection is conducted to verify proper function.

2. Tankless Water Heater Installation

Tankless Gas Water Heater

1. Evaluate and Prepare: A detailed assessment is done to determine gas line compatibility and ensure proper ventilation. The gas supply is turned off, and the existing system is disconnected.
2. Install and Secure Unit: The new tankless unit is mounted securely on the wall, following manufacturer and local building guidelines. Gas lines are connected, and exhaust venting is properly installed.
3. Connect Water Lines and Test: Water lines are attached, and the gas supply is turned on. The system is tested by running water through the unit, ensuring it heats correctly without leaks.

Read More: Gas Water Heater Maintenance and Repair Tips

Tankless Electric Water Heater

1. Turn Off Power and Prepare: The electrical supply is shut off, and the plumber evaluates the home’s electrical capacity to ensure it supports the new unit’s requirements.
2. Install the Unit: The electric tankless unit is mounted in the appropriate location. Proper spacing from water sources is ensured to meet safety standards.
3. Connect Electrical and Water Lines: The electrical wiring is connected to the unit, and water lines are installed. An electrician may assist in verifying compatibility.
4. Test and Final Adjustments: The water is turned back on, and the unit is tested for heating efficiency. Temperature settings are adjusted, and safety checks are completed.

Can You Install a Water Heater Yourself?

Installing a water heater might seem like a DIY project, but it is generally not recommended. The installation requires knowledge of plumbing, electrical systems, and local building codes. Mistakes during installation can lead to leaks, gas exposure, electrical hazards, and other risks. Furthermore, incorrect installations can void the manufacturer’s warranty. For these reasons, hiring a licensed professional is the safest and most reliable option.

Related: How Long Does It Take To Install a Water Heater?

How Much Should It Cost to Install a New Water Heater?

Water heater installation costs depend on the type of unit—tank or tankless—and the energy source—gas or electric. According to ConsumerAffairs, installation for tank-style water heater models ranges from $150 to $450, with the units themselves costing between $600 to $2,500. These tanks are cheaper initially but less energy-efficient over time.

Tankless water heaters, which heat water on demand, have higher upfront costs. Labor costs for installation range from $600 to $1,850, while the units are priced between $1,200 to $3,500. Despite higher costs, they offer long-term savings due to increased energy efficiency.

For gas versus electric models, gas water heaters are often more expensive to install but may save on operating costs over time, while electric units are cheaper initially but could result in higher electricity bills. 

Water heater replacement costs are usually lower than new installations because existing hookups are reused. For tank-based replacements, labor costs fall between $150 to $450, with unit prices similar to new installations at $600 to $2,500. 

Expert Water Heater Installation Made Simple

Water heaters are indispensable for everyday convenience, but their installation demands technical expertise to ensure safety and optimal performance. While DIY might be tempting to save money, professional installation is the best choice for most homeowners. The associated costs depend on the type of heater and the specific requirements of the home.

If you’re in Prescott, AZ, and need expert assistance with water heater installation, reach out to Stellar Plumbing. Our licensed professionals are ready to provide a seamless, worry-free experience for this crucial household upgrade. Contact us to ensure your hot water needs are met safely and efficiently!