24 plumbers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Thunder Bay: Reliance Heating, Air Conditioning & Plumbing, CR Score 63/100; 4.6★ from 1,614 Google reviews; open 24/7.
Best for emergencies (open 24/7): B. Gibson Mechanical, posts 24/7 hours; ranked #2 of 24.
Most-reviewed: Robert's Plumbing & Sheet Metal Co, 114 Google reviews at 3.9★, the most of 24 ranked after Reliance Heating, Air Conditioning & Plumbing; ranked #14.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
24 Thunder Bay plumbers are ranked here by CR Score, from ten published factors. 8 are open 24/7, 11 open Saturdays and 7 open Sundays, based on posted hours. The median Google rating is 4.7★ across 24 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Reliance Heating, Air Conditioning & Plumbing | 63 | 4.6★ (1,614) | Thunder Bay | 24/7 | Overall |
| 2 | B. Gibson Mechanical | 59 | 4.2★ (52) | Thunder Bay | 24/7 | Emergencies |
| 3 | Bud's Thunder Bay Pressure Clean Ltd | 58 | 5.0★ (10) | Thunder Bay | 24/7 | — |
| 4 | Clow Darling Limited | 57 | 4.1★ (70) | Thunder Bay | 24/7 | — |
| 5 | The Rooterman | 57 | 4.7★ (26) | Thunder Bay | — | — |
| 6 | Axel's Water & Plumbing Centre | 56 | 3.3★ (9) | Thunder Bay | 24/7 | — |
| 7 | Craig Plumbing Centre | 55 | 4.0★ (49) | Thunder Bay | Sat | — |
| 8 | A Villeneuve Mechanical Ltd | 55 | 4.7★ (36) | Thunder Bay | — | — |
| 9 | Adept Plumbing & Mechanical | 53 | 4.7★ (17) | Thunder Bay | — | — |
| 10 | Aqua North Plumbing & Heating | 53 | 5.0★ (11) | Thunder Bay | — | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.6★ from 1,614 Google reviews, the most in Thunder Bay.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #2 because of its Google rating and trade focus: 4.2★ from 52 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #3 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #4 because of its Google rating and trade focus: 4.1★ from 70 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #5 because of its Google rating and trade focus: 4.7★ from 26 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
Ranked #6 because of its Google rating and trade focus: 3.3★ from 9 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #7 because of its Google rating and trade focus: 4.0★ from 49 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #8 because of its Google rating and trade focus: 4.7★ from 36 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #9 because of its Google rating and trade focus: 4.7★ from 17 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #10 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #11 because of its Google rating and trade focus: 4.7★ from 13 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #12 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
Ranked #13 because of its Google rating and trade focus: 4.6★ from 11 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #14 because of its Google rating and trade focus: 3.9★ from 114 Google reviews, listed on Google as “HVAC contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Thunder Bay
Ranked #15 because of its Google rating and trade focus: 4.1★ from 10 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #16 because of its Google rating and review volume: 4.9★ from 113 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #17 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #18 because of its Google rating and trade focus: 4.9★ from 33 Google reviews, listed on Google as “Waterproofing service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #19 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Plumber”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #20 because of its Google rating and availability: 3.7★ from 22 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #21 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Septic system service”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #22 because of its Google rating and availability: 5.0★ from 4 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #23 because of its Google rating and availability: 4.0★ from 4 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Thunder Bay
Ranked #24 because of its Google rating and trade focus: 4.6★ from 10 Google reviews, listed on Google as “Excavating contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
10 more plumbers within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| All Aspects Plumbing | 5.0★ (2) | In Thunder Bay |
| Aqua North Plumbing & Heating | In Thunder Bay | |
| Dell Mechanical Contracting | 1.0★ (1) | In Thunder Bay |
| Delta Earthworks | 5.0★ (2) | In Thunder Bay |
| Giardetti Bros Plumbing Ltd | In Thunder Bay | |
| Mad Jack's Well Shack | 5.0★ (2) | In Thunder Bay |
| MJ Pipeline Solutions | 5.0★ (1) | In Thunder Bay |
| MPS Contracting | In Thunder Bay | |
| Plumb-Tech Kitchen & Bath | In Thunder Bay | |
| PNI Contracting Ltd. | In Thunder Bay |
US national ranges converted to CAD, not adjusted for Thunder Bay. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Water heater replacement | CA$1,240 | CA$1,890 | CA$2,570 | Per unit, installed (unit plus labor); typical range of customer-reported jobs. US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 24 Thunder Bay plumbers on ten factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Thunder Bay data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |