Open: 24 hours
3580 Polaris Ave #17, Las Vegas, NV 89103
© 2025 Active Plumbing Inc
Gas Line Installation for Tankless Water Heaters in Las Vegas, NV
Professional gas line installation for tankless water heaters ensures your new on-demand system has the correct gas supply, pressure, and safety protections—so you get endless hot water without starving other appliances or risking code issues in Las Vegas, Henderson, North Las Vegas, Summerlin, and nearby communities.
✓ Whole-home awareness: We factor in stoves, dryers, fireplaces, and future appliances, not just the new heater.
✓ Properly sized gas lines: We calculate BTU loads and pipe sizes so your tankless unit can actually perform as advertised.
✓ Code-compliant installs: Gas work done to current code and manufacturer requirements—not guesswork.
✓ Tankless-ready upgrades: We handle new gas runs, upsizing existing lines, and meter/pressure coordination where needed.
✓ Whole-home awareness
✓ Properly sized gas lines
✓ Code-compliant installs
✓ Tankless-ready upgrades
What our Clients think about us
Your satisfaction is our priority.
What Is Gas Line Installation for Tankless Water Heaters?
Gas line installation for tankless water heaters is a specialized service focused on ensuring your new heater has a properly sized and safely installed fuel supply, usually including:
Calculating BTU load for the tankless heater plus other gas appliances.
Checking meter capacity and gas pressure to see if upgrades or adjustments are needed.
Designing a pipe route and size from the meter or manifold to the tankless location.
Installing new gas piping, valves, and connections using approved materials.
Performing pressure testing and inspection as required.
Tankless units are often far more demanding than the tank heaters they replace. A line that was “fine” for a 40–50 gallon tank can be undersized for a modern high-BTU tankless heater—leading to:
Poor performance, lukewarm water, or fluctuating temperature
Other gas appliances dropping out or running poorly
Potential code violations and safety concerns
Our job is to make sure the gas side of the system is truly tankless-ready.
Why Choose Active Plumbing
Tankless-aware sizing: Tankless units often require much higher BTU input than old tank-style heaters—something we account for in our load calculations and pipe sizing.
Whole-home gas load calculations: We don’t treat your tankless in isolation—we calculate total demand so your stove, furnace, and other appliances still run correctly.
Permit and code compliant: We follow Nevada plumbing/gas code, manufacturer specs, and local requirements for proper materials, supports, and shutoff valves.
New installs & conversions: Whether you’re adding gas to an electric home, moving from tank to tankless, or relocating equipment, we can design a system that makes sense.
End-to-end coordination: Need venting, water connections, or full tankless installation along with the gas line? We can handle the entire project, not just one piece.
Immediate Actions (What to Do Now)
Write down the brand and model of the tankless unit you have (or plan to purchase)—or let us help you choose one.
Note where you’d like it installed: garage, exterior wall, attic, utility room, or closet.
Make a quick list of other gas appliances in your home (furnace, range, dryer, fireplace, pool heater, etc.).
If you’ve had issues like low hot water output or other gas appliances dimming or weakening when the water heater runs, jot that down too.
Call Active Plumbing at (702) 438-3357 and ask about gas line installation for tankless water heaters; we’ll schedule a visit to evaluate your gas system and tankless plans.
Do not attempt DIY gas line installation or modification—incorrect gas work can lead to leaks, fire, or carbon monoxide hazards. Always use licensed professionals.
Common Situations Where a New/Upgraded Gas Line Is Needed
You’re replacing a tank-style heater with a tankless unit of significantly higher BTU.
Your existing gas line is small diameter and was already borderline for your old heater.
You’re adding a tankless unit in a new location (e.g., outside wall, different area of garage, attic).
You’re adding other high-demand gas loads—like a pool heater, outdoor kitchen, or second furnace—and still want the tankless to perform.
You’ve noticed flame dimming on other appliances or inconsistent hot water when multiple gas appliances run.
You had a previous install where no one checked the total gas load, and performance has never been right.
Site Visit & System Evaluation
We start by inspecting your existing gas meter, main gas piping, and current gas appliances. We’ll also look at where the tankless is or will be installed and how far it is from the meter or gas manifold.
Load Calculation & Sizing
We calculate:
Total BTU demand of all gas appliances (existing + tankless).
Required pipe size and route to safely and reliably supply the tankless under peak load.
Whether your meter or pressure is adequate—or if coordination with your utility is recommended.
Design & Proposal
We design a gas line routing plan that balances function, appearance, and convenience. Then we provide a clear, itemized estimate showing materials, labor, and any related work (e.g., shutoff valves, manifold work).
Gas Line Installation
On installation day, we:
Shut off gas safely and protect existing appliances.
Run the new gas line using approved materials and supports.
Install code-compliant shutoff valves, unions, and connections at the tankless location.
Testing, Inspection & Startup
We perform required pressure tests and checks to confirm no leaks and proper gas pressure. If inspections are needed, we coordinate scheduling and access. Once everything passes, we light and test the tankless to confirm it’s receiving adequate fuel.
Final Walkthrough & Education
We’ll walk you through:
Where the shutoff valves are and how they work.
Any basic maintenance advice specific to your setup.
Signs to watch for that might indicate future issues (unusual odors, performance changes, etc.).
What’s Included
A typical gas line installation for a tankless water heater may include:
Evaluation of existing gas system, meter, and appliance loads
Load calculations and gas line sizing for the tankless and other appliances
Design and installation of new or upsized gas piping to the tankless location
Installation of code-compliant shutoff valves and required fittings
Pressure testing and leak checks, and coordination with inspection as needed
Startup assistance and basic homeowner orientation for the new gas line and tankless heater
(Exact scope depends on your home’s layout, existing gas system, and tankless heater requirements.)
Costs & Timelines (What to Expect)
Pricing for gas line installation for tankless heaters depends on:
Distance and routing from the meter or supply manifold to the tankless.
Whether we’re upsizing sections of existing gas piping or running a completely new line.
The BTU rating and gas type (natural gas vs. propane) of your tankless unit.
Access conditions (finished basement vs. open garage, attic work, exterior runs, etc.).
Any related work—like relocation, full tankless installation, venting, or water line adjustments.
We’ll provide a clear, itemized estimate that outlines:
Labor and materials for the gas line
Any additional upgrades or options (manifold changes, future-proofing, etc.)
Estimated project duration so you know what to expect
Insurance & Claims Help
While gas line installations themselves are usually not insurance-based, proper gas work can help prevent issues that may later become claims, such as:
Leaks or damage from improperly installed gas piping
Performance issues or failures tied to undersized gas supply
If you ever have a gas-related incident:
We can document the condition of your gas system and tankless installation.
Provide itemized invoices and descriptions of the work we performed.
Help identify whether issues are likely tied to equipment, installation, or other factors.
Your insurance company and policy always determine coverage; we provide clear, professional documentation and repair support.
Risks of Waiting (Why Act Now)
Tankless gas line installations have some important limitations and realities:
Undersized lines can cause tankless units to underperform or fail to maintain temperature under load.
Adding a tankless to an already maxed-out system without proper load calculations can starve other appliances.
In some cases, your gas meter or pressure may need utility coordination or upgrades.
Certain installation locations may need additional measures—like venting, condensate handling, or clearance considerations, even beyond gas piping.
DIY or non-licensed gas work can lead to serious safety hazards and may impact warranty and insurance coverage.
We’ll be direct if your home needs more than just a simple tee and short run to safely support a tankless system.
Methods, Materials & Quality Standards
Code-compliant gas piping: We use approved materials, fittings, and supports appropriate to your installation.
Proper calculations: We perform BTU and pipe sizing calculations to ensure the tankless and other appliances can be supported.
Thorough testing: Installed gas lines are pressure tested and leak-checked before being placed into service.
Licensed professionals: Gas work is performed by licensed Nevada plumbers/technicians, not handymen.
Manufacturer-aligned: We follow tankless manufacturer guidelines for gas supply, clearances, and connections.
Frequently Asked Questions
Do I really need a new gas line for my tankless?
Often yes—tankless water heaters typically require more gas input than smaller tank-style units. We’ll evaluate your existing line and loads and tell you whether an upgrade is necessary.
Can I just connect the new heater to the old line?
Not without checking the numbers. What “worked” for a tank can be unsafe or inadequate for a tankless. We always do load calculations and sizing before connecting.
Can you install both the tankless unit and the gas line?
Yes. We can handle full tankless installation, including gas, water, venting, and startup, or just the gas line portion if you’re coordinating with another installer.
What if my gas meter is too small?
If your meter or service needs upgrades, we’ll explain the situation and coordinate guidance with your gas utility as needed.
Do you work with both natural gas and propane?
Yes. We can install gas lines for natural gas and certain propane configurations, as appropriate for your property and equipment.
Do you offer gas line installation for tankless water heaters near me in Las Vegas?
If you’re in Las Vegas, Henderson, North Las Vegas, Summerlin, or nearby communities, yes—Active Plumbing installs and upgrades gas lines for tankless water heaters.
More Active Plumbing Gas Line Services
Proudly Serving All of Las Vegas
Address: 3580 Polaris Ave #17, Las Vegas, NV 89103
Phone: (702) 438-3357
Hours: Open 24 hours
Email: service@activeplumbinginc.com
Active Plumbing is Las Vegas–based and available 24/7 for residential and commercial plumbing across Southern Nevada. We handle emergency plumbing, drain cleaning, sewer line repair, slab leaks, water heater repair and installation (including tankless), water softeners and filtration systems, leak detection, gas line installation, and full bathroom and kitchen plumbing upgrades—fast, professional, and backed by strong warranties.
Serving Las Vegas, Henderson, North Las Vegas, Summerlin, Paradise, Spring Valley, Enterprise, Sunrise Manor, Boulder City, and the surrounding neighborhoods.
Let’s start a conversation
Book Your Free Consultation call Now
Contact us:
CALL (702) 438-3357
Hours: Open 24 hours
3580 Polaris Ave #17, Las Vegas, NV 89103