Water line repair & replacement in Knoxville, TN.
A soggy patch in the yard. Pressure that dropped for no reason. A water bill that doubled. Hard Knox Plumbing locates underground water line leaks with electronic detection — then repairs or replaces the line without tearing up your whole property.
Licensed and insured, permitted and inspected where required, warrantied when finished. Financing available on full service line replacements.
Find it first
We locate the leak before we dig.
An underground water line leak rarely announces itself. It shows up as a bill you can’t explain, a spongy stretch of lawn, or pressure that’s slowly gotten worse over a year. Meanwhile it can waste thousands of gallons a month and quietly undermine the soil around your foundation.
Guessing is expensive. We start with pressure testing and electronic leak detection to pinpoint the failure, then open only the ground we need to. Most homeowners are surprised by how contained a properly located repair is.
When a line has failed in multiple places — common with old galvanized steel or polybutylene — we’ll tell you honestly that replacement beats another patch. You get a firm price for either path and the reasoning behind our recommendation.
No water at all, or water coming up in the yard? Shut off the main and call 865.765.8946. We handle water line emergencies 24/7.
Water Line Services
From a pinhole leak to a full service line.
Electronic leak detection
Acoustic and pressure-based location of underground leaks, so excavation is limited to the actual failure point.
Spot repairs
A single failed joint, split, or fitting repaired cleanly with the correct materials and a proper backfill.
Service line replacement
Full replacement from the meter to the house in modern materials, permitted, inspected, and warrantied.
Whole-home repiping
Aging galvanized or polybutylene replaced with PEX or copper — staged so your family keeps water during the work.
Pressure problems
Low pressure, water hammer, or pressure that’s too high: we diagnose the cause and correct it, including regulator replacement.
Frozen & burst pipes
East Tennessee cold snaps split pipes. We thaw, repair, and advise on insulation so it doesn’t repeat next January.
What to Expect
How a water line job goes.
Diagnose & locate
We confirm you have a leak, determine whether it’s on your side of the meter, and pinpoint its position and depth.
Firm written price
Repair or replace, with the reasoning and the number in writing before we start. Permits included where the job requires them.
Repair with minimal disruption
We open only what we need, protect what we can, and keep your water off for the shortest window possible.
Test, restore, warranty
Pressure tested, inspected where required, ground restored, and backed by our workmanship warranty.
A failing water line is not an optional repair.
It also isn’t something most people have budgeted for. Financing lets you replace the line properly — permitted, warrantied, done once — and pay for it over time instead of all at once.
Common Questions
Water line questions, answered.
How do I know if I have a water line leak?
The usual tells: a water bill that jumps without a change in habits, a patch of grass that stays green or soggy in dry weather, low pressure throughout the house, a meter that keeps turning with every fixture off, or the sound of running water when nothing is on. Any one of those is worth a call — an underground leak wastes thousands of gallons quietly.
Can you find a leak without digging up my whole yard?
Yes. We use electronic leak detection and pressure testing to pinpoint the location before any shovel touches dirt, so excavation is limited to the spot that actually needs it. That means less yard restoration, less time, and a smaller bill than exploratory digging.
Who is responsible for the water line — me or the utility?
Generally the utility owns the main and the meter; the service line running from the meter to your house is the homeowner’s responsibility. That means a leak on your side of the meter is your repair — and your water bill. We can help you determine which side of that line the problem is on.
How much does a water line repair cost in Knoxville?
A spot repair on an accessible line is a modest job. A full service line replacement — trenching or boring from the meter to the house, permitting, and restoration — is a larger one. We locate the problem first, then give you a firm written price for the actual fix, and financing is available for full replacements.
How long does a water line replacement take?
Most residential service line replacements are completed in one to two days depending on length, depth, obstacles like driveways or mature landscaping, and inspection scheduling. We work to keep your water off for the shortest window possible and tell you upfront what that window will be.
What causes water lines to fail?
Age and material, mostly. Older galvanized steel corrodes from the inside out, and polybutylene fittings fail. Add ground shifting, freeze-thaw cycles, tree roots, and high water pressure, and a line that’s been fine for decades can start leaking in several places at once. When we see multiple failures on one line, replacement is usually the smarter money.
Do you handle repiping inside the house too?
Yes. If your home still has galvanized or polybutylene supply lines, we can repipe in modern PEX or copper — often in stages, so your household keeps running water throughout. We’ll walk you through the plan, the price, and the schedule before starting.
Recommended by your neighbors.
“My cost was exactly what he told me over the phone. He was on time, cleaned up after the repair and was very courteous. Hard Knox Plumbing will always be my first call.”
“As I expected, my call was answered by someone who actually knew what my problem was. Danny was able to work me in today.”
“It was an amazing service. They were on time, on budget and great to work with. Very knowledgeable, very friendly, and a reasonable price.”
From the blog
Straight answers on water lines & leaks.
Related Services
Related plumbing services.
Drain Repair & Clearing
Slow or clogged drains cleared fast — and fixed so they stay clear.
Learn more →Fixture Repair & Replacement
Faucets, toilets, sinks, and disposals repaired or upgraded cleanly.
Learn more →Hard Knox Home Club
Annual inspection, priority scheduling, and member-only repair discounts.
Learn more →Local Leak Specialists
Knoxville soil, Knoxville pipe, local crews.
Rocky East Tennessee ground and decades-old service lines make for interesting excavation. Hard Knox Plumbing operates from 3414 Henson Rd C, Knoxville, TN 37921 and repairs water lines throughout Knoxville, Farragut, Hardin Valley, Lenoir City, Oak Ridge, Loudon, Alcoa, and Maryville — every property inside 25 miles.
Call 865.765.8946 — a real person answers 24/7, including nights, weekends, and holidays.
Burst pipe or no water?
Shut off the main, then call us.
Every minute a broken line runs costs you water and risks damage. We answer 24/7 — nights, weekends, and holidays.