- HEP Plumbing
- Gas Line Adjustments

Gas Line Adjustments
Gas Line Adjustments | Tankless Water Heater Install | Plumbing | Allardt
Imagine stepping into your Allardt home to find endless hot water on demand, lower energy bills, and the peace of mind that comes from knowing expert plumbers handled every detail. At HEP, our licensed team specializes in safe, code-compliant gas line adjustments that pave the way for a flawless tankless water heater install. From calculating BTU loads to re-routing gas piping and venting, we do the technical heavy lifting so you can simply enjoy faster, more efficient hot water.
Whether you’re upgrading a growing household or looking to boost property value, HEP delivers turn-key solutions backed by transparent pricing and a 100% satisfaction guarantee. We arrive on time, respect your space, and leave you with a compact, high-performance system that’s built to last—plus the friendly, small-town service Allardt homeowners trust. Ready to make the switch? Give us a call today and experience why neighbors say, “Happy Everything’s Possible with HEP!”
FAQs
Do I need to upgrade my gas line when switching to a tankless water heater in Allardt?
Most tankless units require a higher BTU input (150,000–199,000 BTU) than standard tank-type heaters (30,000–50,000 BTU). In many Allardt homes the existing ½-inch gas line is undersized for that load, so we commonly upsize to ¾-inch—or sometimes 1-inch—black iron or CSST piping. During our on-site assessment we measure the total demand of all gas appliances, the distance from meter to heater, and the available inlet pressure from Volunteer Energy Cooperative to confirm whether an upgrade is necessary.
What permits or inspections are required in Allardt for gas line adjustments and a tankless installation?
The City of Allardt follows Fentress County’s adoption of the 2018 International Fuel Gas Code (IFGC). A mechanical permit is needed any time we alter fixed fuel-gas piping. After rough-in, the county inspector performs a pressure test—usually 10 psi for 15 minutes on low-pressure systems—before pipes are covered. A final inspection clears the tankless unit, vent termination, and combustion-air provisions. Our team pulls the permit and schedules both inspections for you.
How long does the entire installation take—from gas line adjustment to hot water running?
Most jobs are completed in one workday (6-9 hours). The sequence is: 1. Isolate and purge existing gas system (30 min) 2. Run new or upsized gas piping (2–4 hrs) 3. Mount and plumb the tankless heater, including water and condensate lines (1–2 hrs) 4. Install venting through the wall or roof (1 hr) 5. Pressure test, leak-check, and flush unit (1 hr) 6. Inspector sign-off and customer orientation (30 min) Larger homes or attic/crawl-space runs can add a half day.
What are the energy and cost benefits of going tankless in the Allardt climate?
Allardt’s moderate winters mean tankless units rarely reach maximum firing rate, allowing the modulating burner to run efficiently at 20–40 % capacity for most of the year. According to DOE data, ENERGY STAR® condensing tankless models save the average Tennessee household $80–$120 annually in gas costs and eliminate standby losses entirely. With an expected life span of 20+ years, lifetime savings often exceed $2,000 versus a standard 50-gallon tank.
Will my home’s water pressure or supply be affected?
No—tankless heaters do not restrict pressure if sized correctly. We match the unit’s flow rate (gallons per minute) to your home’s fixture count and incoming water temperature (typically 56–60 °F in Allardt). For a 2-bath residence we generally install a 7.5 GPM rated unit, which can run two showers simultaneously without pressure drop. A pressure-reducing valve is added only if city water pressure exceeds 80 psi.
How do you ensure safety and code compliance during gas line work?
Safety is our top priority. We: • Perform a full shut-off and lock-out at the meter. • Purge air using an inert gas. • Use only ASTM A53 Schedule 40 black iron or CSST piping listed to ANSI LC 1. • Bond and ground CSST per IFGC 310.1.1 and NEC 250.104. • Pressure-test with calibrated gauges before restoration. • Provide a written warranty and the manufacturer’s registration for your tankless unit. These steps exceed the minimum requirements of Fentress County inspections.