Installing a new water heater in your Raleigh home may seem straightforward, but even small mistakes can lead to costly repairs, reduced efficiency, and serious safety risks. Whether you’re considering a DIY installation or hiring a professional, understanding the most common water heater installation mistakes can help you avoid future headaches. Here’s what Raleigh homeowners need to watch out for when installing a water heater.
1. Choosing the Wrong Size Water Heater
One of the most common mistakes is selecting a unit that’s either too large or too small for your household. An undersized heater will struggle to meet your hot water needs, while an oversized one can drive up energy bills unnecessarily. In Raleigh, a professional installer can assess your household size, daily usage patterns, and plumbing setup raleigh water heater installation to recommend the right tank or tankless model. Getting the correct size from the start ensures consistent performance and energy efficiency.
2. Improper Venting (for Gas Water Heaters)
Gas water heaters require proper venting to safely expel harmful gases like carbon monoxide. Incorrect installation of venting systems—such as improper slope, loose fittings, or inadequate clearance—can pose serious health risks. Local Raleigh codes have specific requirements for venting materials and configurations. Hiring a licensed plumber ensures compliance and protects your family’s safety.
3. Skipping the Permit Process
In Raleigh, water heater installations typically require a plumbing permit, and in some cases, an inspection by local authorities. Skipping this step to save time or money can lead to code violations, denied insurance claims, and potential fines. Always confirm that your installer will secure the necessary permits before starting the job.
4. Poor Placement or Clearance
Installing your water heater in a cramped or unventilated area can limit access for maintenance and repairs, and in the case of gas units, increase the risk of fire. North Carolina building codes dictate minimum clearance requirements to ensure safety and airflow. Always check that your water heater has enough surrounding space for future servicing and proper ventilation.
5. Incorrect Temperature Settings
Setting the water temperature too high not only increases the risk of scalding but also raises energy consumption. On the other hand, setting it too low can promote bacterial growth. The U.S. Department of Energy recommends a temperature setting of 120°F for most households. Make sure your installer adjusts it correctly during setup and shows you how to make changes safely.
6. Improper Connections
Whether it’s loose water lines, incorrect pipe materials, or faulty pressure relief valve installation, poor connections can lead to leaks and water damage. One common DIY mistake is using the wrong type of pipe (like PVC on hot lines) or over-tightening fittings. Raleigh professionals are trained to make code-compliant connections that stand up over time.
7. Forgetting to Drain the Old Unit
When replacing a water heater, failing to fully drain the old unit before removal can create a mess or cause injuries. This task should always be handled with caution—especially if the tank still contains hot water or sediment buildup.
Water heater installation is not a project where shortcuts pay off. Avoiding these common mistakes can save you time, money, and frustration in the long run. If you’re in Raleigh, working with a licensed, experienced installer is the best way to ensure a safe, efficient, and code-compliant installation.