- HEP Plumbing
- Hot Water

Hot Water
Hot Water | Tankless Water Heater Install | Plumbing | Maryville
Enjoy endless hot water, lower utility bills, and precious extra space when you call on HEP’s certified plumbing team in Maryville. Our pros size the perfect unit for your household, arrive on time with everything needed for a seamless tankless water heater install, and back their workmanship with industry-leading warranties. From disposing of the bulky old tank to programming your new digital controls, we handle every detail so you can start savoring consistent, on-demand comfort right away.
HEP is a local favorite for courteous service, transparent pricing, and 24/7 emergency support. Whether you’re upgrading for energy efficiency, remodeling a tight utility closet, or looking to add value before a home sale, we make the switch to tankless smooth and stress-free. Schedule today and discover why so many Maryville homeowners trust us to keep the hot water flowing.
FAQs
What are the main advantages of installing a tankless water heater in Maryville compared with a traditional storage-tank unit?
Tankless (on-demand) systems heat water only when you open a tap, so they eliminate standby heat loss and can cut energy use by 25-40 %. They supply endless hot water, free up floor space, and typically last 18-20 years—almost double the life expectancy of a conventional tank. Because Maryville’s water rates and utility costs keep rising, the efficiency savings translate into noticeably lower monthly bills. In addition, modern tankless models offer precise digital temperature control and built-in safety diagnostics.
How long does a typical tankless water heater installation take in the Maryville area?
Most residential replacements are completed in one business day (6-8 hours). The timeline includes removing the old tank, upgrading gas or electrical service if needed, mounting the new unit, running venting or intake piping, and performing final start-up tests. Larger homes that need multiple units or a dedicated recirculation line can extend the job to two days. We schedule permitting and inspection with the City of Maryville in advance so there are no delays.
Do I need a permit or inspection for a tankless water heater installation in Maryville?
Yes. The City of Maryville requires a plumbing/mechanical permit for any water heater change-out, plus a final inspection once the work is complete. If gas piping is modified, the city also mandates a pressure test. Our licensed technicians handle all paperwork, pull permits, coordinate with city inspectors, and ensure the installation meets the 2021 International Plumbing Code and local amendments. You will receive a signed inspection card for your records.
What size or flow-rate tankless unit do I need for my household?
Sizing is based on simultaneous hot-water demand and incoming groundwater temperature (about 55 °F in Maryville). A family of four that often runs two showers and a dishwasher at once generally needs 7–9 gallons per minute (GPM). We perform a free in-home assessment, tally fixture demand, and recommend single or cascading units that provide adequate GPM at a 60–70 °F temperature rise. Proper sizing prevents the "cold-water sandwich" effect and maximizes efficiency.
Are there rebates, tax credits, or utility incentives for tankless water heater installations in Maryville?
Yes. As of 2023, qualifying ENERGY STAR® tankless models may be eligible for a 30 % federal tax credit (up to $600) under the Inflation Reduction Act. TVA’s EnergyRight® program and some local electric cooperatives offer $200-$300 rebates when you switch from an electric tank to a high-efficiency gas or electric heat-pump/tankless system. We provide all documentation and help you submit rebate applications so you capture every available incentive.
What maintenance does a tankless water heater require after installation?
Annual servicing is recommended: flushing the heat exchanger with a vinegar solution to remove mineral scale, cleaning the air filter, and checking venting, gas pressure, and combustion. Maryville’s moderately hard water (6-8 grains per gallon) can cause scale buildup that reduces efficiency, so we also suggest installing a pre-filter or water softener. Regular maintenance extends the unit’s lifespan, maintains warranty coverage, and ensures peak energy performance.