New Water Heater Installation, Done Right
Correctly sized, code-compliant installation of new gas or electric tank water heaters.
Overview
Installing a new tank water heater involves more than swapping the old unit for a new one. Correct sizing for your household’s hot water demand, proper venting for gas units, code-compliant electrical or gas connections, and safe removal of the old unit all matter for a system that performs well and lasts its full expected lifespan.
A licensed local specialist can help you choose the right tank size and efficiency rating, handle permitting where required, and ensure the finished installation meets local plumbing and gas code.
What This Service Typically Includes
- Sizing recommendation based on household hot water demand
- Removal and disposal of the old water heater
- New tank installation — gas or electric, 30 to 80+ gallon capacity
- Code-compliant venting, gas line, and electrical connections
- Pressure relief valve, expansion tank, and shut-off valve installation
Warning Signs to Watch For
- Current unit is 10+ years old and showing signs of decline
- Household regularly runs out of hot water
- Planning a bathroom addition or renovation that increases hot water demand
- Current unit is undersized for household size
- Wanting to switch from electric to gas or vice versa
How This Service Works
1. In-home sizing consultation
Before any unit is chosen, a specialist looks at household size, number of bathrooms, peak-usage habits (back-to-back showers, laundry, dishwasher timing), and the existing fuel type and connections to recommend a tank size and efficiency tier that actually matches your usage rather than a one-size-fits-all default.
2. Code and permit check
Many jurisdictions require a permit for water heater installation, particularly for gas units or any change in venting. The specialist identifies what your local code requires before work begins, so the finished job passes inspection rather than needing rework later.
3. Old-unit removal and site prep
If this is a first-time install rather than a replacement, this step is skipped or limited to clearing the installation space. Where an old unit exists, it’s drained, disconnected, and removed to make room for correct clearances around the new unit.
4. Installation and code-compliant connections
The new tank is set, leveled, and connected — gas line and venting for gas units, or a dedicated circuit for electric units — along with a pressure relief valve, shut-off valve, and expansion tank where required by local code.
5. Leak test, startup, and walkthrough
Once connected, the system is pressure-tested for leaks, brought up to temperature, and the technician walks you through the shut-off locations, warranty registration, and any maintenance the new unit needs going forward.
What Affects the Cost
Tank capacity and efficiency tier
A larger tank or a high-efficiency model typically costs more upfront than a standard 40-gallon unit, though efficiency models can lower monthly energy bills over time.
Gas vs. electric, and any fuel-type switch
Switching fuel types (electric to gas or vice versa) usually requires new gas line, venting, or electrical work, which adds materials and labor beyond a like-for-like install.
Venting and gas line condition
If existing venting doesn’t meet current code for the new unit’s BTU rating, or the gas line diameter is undersized, upgrading these adds to the job.
Permit requirements in your area
Permit fees and inspection scheduling vary significantly by city and county, and are typically itemized separately from labor and materials.
First-time install vs. replacing an existing unit
Installing where no water heater previously existed can mean running new plumbing, gas, or electrical lines to the location — more involved than swapping an existing unit in place.
Ready to Get Connected With a Local Pro?
Tell us what you need and your location — we’ll route your request to a licensed local water heater professional.
Frequently Asked Questions
What size water heater do I need?
Tank sizing depends on household size and peak hot water usage — as a general guide, a 40-gallon tank suits many 2-3 person households, while larger households often need 50-80 gallons. A specialist can size it precisely for your usage pattern.
How long does a new water heater installation take?
A straightforward like-for-like replacement is typically completed in 2-4 hours. Installations requiring new venting, gas line work, or electrical upgrades can take longer.
Do I need a permit to install a new water heater?
Many jurisdictions require a permit for water heater installation, especially for gas units. A licensed specialist can handle permitting as part of the installation.
Helpful Guides for Water Heater Installation
What Size Water Heater Do I Need? A Sizing Guide by Household
Water heater sizing depends on household size, peak-hour usage, and fuel type. Use this guide to estimate the right tank capacity or tankless flow rate before you buy.
Read guide