Hard Knox Plumbing
Plumber · Knoxville, TN · Open 24 hours per Google listing
Our verdict
Hard Knox Plumbing holds 5★ across 350 Google reviews with BBB A+ accreditation; 87 of 88 analyzed reviews are 5★ — fast_response cited 18 times, same-day Saturday emergency response confirmed, and tankless water heater installs praised for detail.
Scores are our editorial reading of published customer reviews — not a verification, license check, or guarantee.
Ranked #2 of 15 plumbers we've reviewed in Knoxville, TN · compare all →
Our opinion, based on the 88 reviews we analyzed from Google, Yelp and BBB · Analysis updated Jun 2026 · How we decide ↗
Lists 24-hour service on its Google profile — and reviewers describe after-hours calls.
What reviewers praise
After-hours Saturday emergency: answered immediately when multiple competitors didn't, on-site within 30 minutes — confirmed in 1 of 88 reviews
1 cited review
“We had to call for an after hours Saturday appointment. Tried several others plumbers and could not get an answer or call back. Hard Knox answered right away and made it to our house within 30 minutes. So glad we got connected with them. The price was super reasonable and the problem was solved.”
themeCounts.fast_response=18 across 88 reviews; Danny arrived within 1 hour for Saturday disposal leak, on-time for weekday water heater appointment
1 cited review
“Danny and his assistant, Anthony, did a great job installing a tankless water heater and house carbon filter system. During the installation, they both showed a high level of attention to detail and pride in workmanship. They did a superb job.”
Cited in 2 of the 88 reviews we analyzed — 1 cited review not excerpted here.
Tankless water heater + carbon filter install praised for 'high level of attention to detail and pride in workmanship'; kitchen remodel gas line extension completed with problem-solving on older home
1 cited review
“Danny and his assistant, Anthony, did a great job installing a tankless water heater and house carbon filter system. During the installation, they both showed a high level of attention to detail and pride in workmanship. They did a superb job.”
Cited in 2 of the 88 reviews we analyzed — 1 cited review not excerpted here.
What reviewers report — the concerns
We looked for patterns of complaints in the 88reviews we analyzed and didn't find any. That's rare — but it's a reading of published reviews, not a guarantee.
The evidence — in reviewers' own words
Critical
“The plumber came 4 times and did not fix the problem! We want our money bac!!”
Positive
“Had an issue on Saturday with kitchen disposal leaking. Called Hard Knox and within an hour Danny was here to repair. Fairly priced considering was Saturday and he was very professional and did job quickly. Appreciate the help here.”
“Hard Knox was great. We had a water softening and filtration system put in. They were on time, very professional and friendly and did a great job. Would not hesitate to highly recommend them.”
Quotes are reproduced verbatim from public reviews on the platforms shown; we select which to feature, and selection reflects our editorial judgment. Report a quote that doesn't match its source ↗
The rating picture
Newest review in our sample: Mar 2026.
Across platforms
Should you hire Hard Knox Plumbing?
Best for
- Emergency and same-day calls
- Complex installs and remodels
- Water heater install/repair
- Emergency and burst pipe repair
Hire if
- You need a plumber who actually shows up when scheduled
- You need high-quality work that holds up over time
Think twice if
- You need rock-bottom prices with zero flexibility on the quote
- You need detailed walkthroughs and written estimates before work starts
Advice derived from the review analysis above — how we decide.
Own Hard Knox Plumbing?
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Nearby: Knoxville · Lenoir City · Briceville