- HEP Plumbing
- Modern PEX

Modern PEX
Modern PEX | Pipe Upgrades | Plumbing | Sevierville
When your Sevierville home still depends on aging copper or galvanized lines, every drip and discoloration is a reminder that time is working against your plumbing. HEP’s specialists make the switch to flexible, corrosion-proof PEX fast and worry-free, threading durable new lines through tight spaces with minimal wall cuts and zero rust risk. With our tailored pipe upgrades, you gain better water pressure, longer pipe life, and the peace of mind that comes from materials built to withstand East Tennessee’s temperature swings.
From the initial inspection to the final pressure test, HEP keeps you informed and your property spotless, often completing whole-home repipes in just a day or two. Enjoy cleaner water, lower chances of leaks, and the transferable warranties that boost resale value—plus financing options that fit almost any budget. Schedule your free estimate today and see how effortless modern PEX plumbing and expert pipe upgrades can be.
FAQs
What is PEX plumbing and why should I consider upgrading my older pipes?
PEX (cross-linked polyethylene) is a flexible, durable plastic tubing used for water supply lines. Upgrading to PEX eliminates many issues associated with galvanized steel, polybutylene, or aging copper pipes, such as corrosion, pin-hole leaks, and mineral buildup. PEX resists scale and chlorine, does not rust, and can expand slightly if water freezes, reducing burst risk. Because the tubing comes in long rolls, it requires fewer fittings, which means fewer potential leak points and faster installation—often saving 25–40 % on labor compared with traditional materials.
How does PEX perform in Sevierville’s climate compared with copper or PVC?
Sevierville’s seasonal temperature swings—with humid summers and the potential for winter freezes—are well suited for PEX. The tubing remains flexible down to –40 °F and can expand up to three times its diameter before returning to normal size, greatly reducing freeze-related ruptures that plague copper and CPVC. In hot, humid conditions, PEX also resists condensation and the external corrosion that can attack metal pipes. Overall, homeowners enjoy a longer service life (50+ years) with fewer climate-related failures.
Will PEX pipe upgrades work with my existing plumbing fixtures and water heater?
Yes. Universal brass or polymer transition fittings allow PEX to be connected securely to copper stub-outs, threaded faucet supplies, and standard water-heater nipples. During a repipe, licensed plumbers typically leave short sections of copper or stainless steel where fixtures emerge from walls for rigidity, then transition to PEX in concealed areas. This means you can keep all sinks, toilets, and your current water heater without modification. If you plan future fixture upgrades, the flexibility of PEX makes rerouting or adding lines simpler and less invasive.
How long does a whole-home PEX repipe usually take in Sevierville?
A two-bathroom, single-story home can often be fully repiped in 1–2 days, while larger or multistory homes may take 3–5 days. The timeline includes shutting off water, pulling new PEX through walls, making fixture connections, pressure testing, and patching small access holes. Because PEX can snake through existing cavities, less drywall removal is necessary than with rigid piping, allowing most families to stay in the home during the upgrade. Your water is usually restored every evening while work is in progress.
Does PEX meet local and state building codes, and is it safe for drinking water?
Absolutely. Tennessee adopted the International Residential Code (IRC) Section P2904, which specifically lists PEX as an approved material for potable water lines. Sevierville inspectors accept PEX installations when they follow manufacturer guidelines and ASTM standards F876/F877. All major PEX brands are NSF/ANSI 61 certified for drinking-water safety and are free of lead, BPA, and phthalates. A licensed Sevierville plumbing contractor will obtain the proper permit and schedule an inspection to ensure code compliance and peace of mind.
What does it cost to upgrade to PEX, and are financing options available?
Costs vary with home size, number of fixtures, and accessibility. In Sevier County, full repipes average $4,000–$7,500 for a 1,500–2,500 sq ft residence—typically 20–30 % less than copper. The price includes materials, labor, permits, and wall repair. Many plumbing companies, including ours, offer 0 % short-term financing or low-interest plans up to 60 months to spread payments. Because PEX reduces future leak risk and may lower homeowners-insurance premiums, the upgrade often pays for itself over time. We also provide free in-home estimates so you know exact costs before work begins.