Top 10 Tankless Water Heater in Knoxville, TN

Updated March 2026 · Based on licensing, reviews & response time

Quick Answer

Top providers: The Plumbing Authority (4.9), Tennessee Standard Plumbing (5), Hard Knox Plumbing (5)

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1

The Plumbing Authority

1209 Buchanan Ave, Knoxville, TN 37917, USA
★★★★½ 4.9 (1,885 reviews)
Licensed & InsuredTop Rated
Services: Tankless Water Heater
Knoxville, TN (865) 390-6944
2

Tennessee Standard Plumbing

6634 Central Ave Pike #108, Knoxville, TN 37912, USA
★★★★★ 5 (2,186 reviews)
Licensed & InsuredTop Rated
Services: Tankless Water Heater
Knoxville, TN (865) 333-4321
3

Pipe Wrench Plumbing, Heating & Cooling

4303 Central Ave Pike, Knoxville, TN 37912, USA
★★★★½ 4.8 (5,734 reviews)
Licensed & InsuredTop Rated
Services: Tankless Water Heater
Knoxville, TN (865) 378-6414
4

Hard Knox Plumbing

3414 Henson Rd C, Knoxville, TN 37921, USA
★★★★★ 5 (322 reviews)
Licensed & Insured
Services: Tankless Water Heater
Knoxville, TN (865) 765-8946
5

Hiller Plumbing, Heating, Cooling & Electrical

5507 Ball Camp Pike, Knoxville, TN 37921, USA
★★★★½ 4.9 (5,233 reviews)
Licensed & Insured
Services: Tankless Water Heater
Knoxville, TN (865) 545-0947
6

My Professional Plumber

215 Center Park Dr #300, Knoxville, TN 37922, USA
★★★★½ 4.9 (88 reviews)
Services: Tankless Water Heater
Knoxville, TN (865) 674-1498
7

Chaffee HVAC, Plumbing, & Electrical

5725 Ball Camp Pike, Knoxville, TN 37921, USA
★★★★½ 4.9 (1,286 reviews)
Services: Tankless Water Heater
Knoxville, TN (865) 602-3552
8

Valley Plumbing, Inc.

11826 Kingston Pike, Knoxville, TN 37934, USA
★★★★½ 4.8 (552 reviews)
Services: Tankless Water Heater
Knoxville, TN (865) 264-3203
9

John H Coleman Co

805 Corridor Park Blvd, Knoxville, TN 37932, USA
★★★★½ 4.9 (931 reviews)
Services: Tankless Water Heater
Knoxville, TN (865) 350-5119
10

Pipe Wrench Plumbing, Heating & Cooling

501 Omni Ln, Knoxville, TN 37932, USA
★★★★½ 4.9 (1,133 reviews)
Services: Tankless Water Heater
Knoxville, TN (865) 378-8390

How We Ranked These Knoxville Pros

Our rankings are based on a weighted evaluation of five key factors:

  1. Licensing & Insurance — All listed businesses hold active state licenses verified through official databases.
  2. Customer Reviews — We aggregate ratings from Google, Yelp, and the BBB, weighting recency and review volume.
  3. Response Time — Companies offering same-day or 24/7 emergency service score higher.
  4. Pricing Transparency — Businesses who offer flat-rate pricing or free estimates rank above those with opaque billing.
  5. Experience & Longevity — Years serving the Knoxville market and breadth of services factor into overall reliability.

Rankings are reviewed quarterly. Have a correction? Contact us.

Frequently Asked Questions

Best tankless water heater in Knoxville?

Top-rated: The Plumbing Authority (4.9), Tennessee Standard Plumbing (5), Hard Knox Plumbing (5).

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