- HEP Plumbing
- Tankless Water Heater

Tankless Water Heater
Tankless Water Heater | Tankless Water Heater Install | Plumbing | Cookeville
Imagine stepping into a hot shower seconds after turning the tap, no bulky tank in sight and no fear of running out of warm water. That’s the everyday comfort HEP brings to Cookeville homeowners with a precision-engineered tankless water heater install. Our licensed plumbers remove the guesswork—calculating peak demand, upgrading gas or electrical lines if needed, and mounting a whisper-quiet unit that delivers endless hot water while saving space and slashing standby energy loss.
From the first call to the final temperature check, you’ll feel why Cookeville trusts HEP. We arrive on time, protect your floors, haul away the old tank, and leave you with a streamlined system backed by strong warranties and our 100% Satisfaction Guarantee. Ready to trade the tank for on-demand performance? Schedule your install today and start enjoying hot water that never quits.
FAQs
What are the main advantages of switching to a tankless water heater in Cookeville?
Tankless units heat water only when you open a tap, so they eliminate standby heat loss and can cut energy use by 25-40 %. They also provide an endless supply of hot water, free up floor space, have life expectancies of 20+ years (about twice that of a standard tank), and often qualify for local utility rebates. Because Cookeville’s moderate climate keeps ground-water temperatures fairly stable, tankless heaters operate efficiently here year-round.
How long does a typical tankless water heater installation take and what is involved?
Most residential installations in Cookeville are completed in one day. First we size the unit based on your home’s peak hot-water demand. On site, our licensed plumbers turn off water, gas, and electricity, drain and remove the old tank, mount the new wall-hung heater, run fresh water and gas lines, and install Category III or concentric venting to meet Tennessee Mechanical Code. We then flush the system, set the temperature, pull a permit with the City of Cookeville, and arrange for the final inspection. You’ll have hot water again before we leave.
Will I need to upgrade my gas line or electrical service?
Possibly. High-efficiency gas models usually need a ¾-in. gas line and up to 199,000 BTU/h. Many Cookeville homes built before 2000 have only ½-in. supply lines, so we may upsell to ¾-in. or add a dedicated line from the meter. Electric tankless units often require 2–4 40- to 60-amp breakers and #6 wire; if your panel is under 200 amps, a service upgrade could be necessary. During the free in-home estimate we measure existing capacity and give you a firm quote that covers any required upgrades.
How much does a tankless water heater installation cost in the Cookeville area?
Prices vary with fuel type, flow rate, and any needed plumbing or venting changes. For a typical three-bath gas unit, expect $3,200–$4,500 installed, including removal of your old tank, new vent kit, water-treatment valve set, labor, permit fees, and a 5-year workmanship warranty. Electric units run $1,200–$2,400 installed but may need a panel upgrade. We provide upfront, no-surprise pricing after evaluating your home.
What kind of maintenance does a tankless water heater require?
Unlike tanks, tankless heaters don’t store water, so corrosion risk is lower, but they do need annual service. We recommend flushing the heat exchanger with white vinegar or food-grade descaler once a year (twice if you have hard water from the Upper Cumberland utility districts) to remove mineral buildup. Our maintenance visit includes cleaning the inlet filter, checking the condensate trap, testing gas pressure, updating firmware, and verifying combustion. Regular maintenance keeps your warranty valid and can add years to the unit’s life.
Are there rebates or incentives for installing a tankless water heater in Cookeville or Tennessee?
Yes. Upper Cumberland Electric Membership Corporation (UCEMC) and Cookeville Gas Department periodically offer $100-$300 bill credits for ENERGY STAR® tankless heaters. Tennessee’s residential energy-efficient appliance credit can add another $75. Federal tax credits under the Inflation Reduction Act allow you to claim 30 % of the total cost (up to $600) for qualifying gas units with ≥0.95 UEF. We provide all the paperwork and certification documents so you can file for these incentives.