- HEP Plumbing
- Rock-solid Warranty

Rock-solid Warranty
Rock-solid Warranty | Tankless Water Heater Install | Plumbing | Cosby
Picture this: endless, on-demand hot water, lower utility bills, and the peace of mind that comes from HEP’s rock-solid warranty. Our licensed, locally based plumbers in Cosby specialize in tankless water heater install services that fit your home’s size, budget, and energy goals. From the moment we arrive, we handle everything—removing the old tank, updating gas or electrical connections, and fine-tuning your new system for maximum efficiency—so you can enjoy steamy showers without a second thought.
Because we back every installation with industry-leading parts and labor protection, you’re covered long after we pull out of the driveway. Add 24/7 emergency support, transparent upfront pricing, and courteous, shoe-cover-wearing techs, and it’s easy to see why neighbors all over Cosby rely on HEP. Ready to future-proof your home’s hot-water supply? Call or click today and experience the HEP difference for yourself.
FAQs
What exactly does your “Rock-Solid Warranty” cover for a tankless water-heater installation in Cosby?
Our warranty is designed to give Cosby homeowners total peace of mind. It includes: • 12-year coverage on the heat-exchanger, • 5-year coverage on all manufacturer parts, and • 2-year coverage on our installation labor—meaning if a workmanship-related leak or venting issue occurs, we fix it at no cost. The warranty is fully transferable if you sell the home, and it also covers the cost of any required code upgrades for the first year after install. All paperwork is filed by our office so your coverage begins the day the job is completed.
How long will the actual installation take, and will I be without hot water for long?
Most straightforward tank-to-tankless swaps in Cosby take 4–6 hours, so you’re usually back to hot water the same day. If your gas line, venting, or electrical service needs upgrading, the project can stretch to a full workday. We always keep at least one functioning water source available until the new unit is online, minimizing the time you’re without hot water.
Are tankless water heaters a good fit for Cosby’s climate and water quality?
Yes. Our area’s moderate winter temperatures and municipal/ well-water hardness levels are well within the operating range of today’s tankless units. We install models with built-in freeze protection to –30 °F and scale-detection technology that alerts you when a flush is needed. For homes on harder well water, we can add a compact pre-filter or softener to protect the heat exchanger and keep your warranty intact.
What maintenance is required to keep my warranty valid?
Tankless systems are low-maintenance but not maintenance-free. The manufacturer and our Rock-Solid Warranty require: 1. An annual professional service visit that includes flushing the heat-exchanger with a vinegar solution, cleaning the inlet filter, and testing safety devices. 2. Visual inspection of the vent and condensate line to confirm nothing is obstructed. 3. Water treatment (softener or scale filter) if your hardness exceeds 12 grains per gallon. We offer an affordable annual service plan and document each visit so your warranty remains in force.
How much can I expect to save on energy bills with a tankless unit?
Because tankless heaters only run when hot water is called for, Cosby homeowners typically see 30–40 % lower water-heating costs versus a standard 50-gallon tank. In dollars, that’s roughly $80–$120 per year for a family using 50 gallons of hot water a day. You may also qualify for a federal 25C tax credit of up to $600 and occasional TVA or local utility rebates, further improving the payback time.
Do you handle permits and code compliance for homes in Cosby and the rest of Cocke County?
Absolutely. Rock-Solid Plumbing pulls all required plumbing/mechanical permits, schedules the county or city inspections, and installs the unit to the latest ICC, TN Plumbing Code, and manufacturer specifications. We also pressure-test the gas line, perform a combustion analysis, and leave a signed inspection tag on the unit. Homeowners only need to be present for site access and the final walkthrough.