The Best Leak Detection Services in Washington
We graded 10 companies on seven things customers actually report: satisfaction, reliability, workmanship, value, momentum, track record and how owners handle complaints.
From 56,414 Google reviews of 54 top-rated leak detection services nationwide; 10 of them in Washington. Updated November 9, 2026.
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Best leak detection services in Washington for heating system installation
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CM HeatingHow Job match is calculatedBuilt only from reviews Google tagged “Heating system installation”:Stars on this job 55%4.96★Number of such jobs 25%641Overall Experts Score 20%92Job match= 95Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.95
Eco Electric, Plumbing, Heating and AirHow Job match is calculatedBuilt only from reviews Google tagged “Heating system installation”:Stars on this job 55%5.00★Number of such jobs 25%3Overall Experts Score 20%90Job match= 73Stars are pulled toward the category average (4.90★) when a company has few tagged jobs, so 3 perfect reviews don’t beat 80 great ones. 4.3★ scores 0, 5.0★ scores full. Volume is compared with the busiest company for this job.73Job match = this company’s ★ on reviews Google tagged “Heating system installation” (shrunk toward the category average when there are few), how many such jobs it has done, and its overall Experts Score.
What customers said about heating system installation
Eco Electric, Plumbing, Heating a…Everyone I spoke with was very professional and personable. They came and gave a diagnosis w/ no hidden fees (unlike some other local places.) Cheaper price for service/new furnace also. Install was completed in timely manner, heater works great!
CM HeatingI called to explore how expensive it would be to upgrade our heating and maybe add AC. I never expected that we'd have a brand-new HVAC system running smoothly the very next day. CM delivered a lightning-fast, high-quality install with top-notch customer service. The process was completely painless, even despite…
Eco Electric, Plumbing, Heating a…I had 14-year old ductless heaters and heat pump replaced. My experience with both the first technician, Vince, who gave me my options, and the technician who installed the equipment, Payton, was excellent. They were thorough in their presentation of options and the installation process. I was very comfortable…
CM HeatingWe had a furnace and heat pump installed. Very efficient, professional. They did a quality work install and finish and cleaned everything after they were done.
CM HeatingI can always count on CM Heating to come to my rescue right away. The team members are always friendly and informative.
CM HeatingGood Experience. Full heating and Air conditioning IN ONE DAY. Got big discount and duct cleaning included. Cheaper than others.
Overall ratings
Experts Score 0–100Experts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. and a letter grade per factor (A = top 20% of leak detection services).
| # | Company | ScoreExperts Score (0–100)Absolute quality first: recency-weighted star average (≈54%), share of 1–2★ reviews (≈24%), customers’ price verdicts (≈14%), owner replies to critical reviews (≈7%); minus up to 10 points each for complaints flagged in Google review highlights and for a real slide in recent ratings. Hover a company’s score on its page for the full breakdown. | FactorsFactor grades, in orderSatisfaction (54%): Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.Reliability (24%): How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.Craft & service (0%): Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.Value (14%): Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.Momentum (0%): Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.Replies to reviews (7%): How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.One letter per factor score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = below 20. | ★Google star rating as shown on Google Maps. | Typical billMedian bill customers of this company reported in their reviews (needs 3+ priced reviews). |
|---|---|---|---|---|---|
| 1 |  Action Leak DetectionEverett, WA | A 100How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%100+58.7Reliability 26%100+26.1Value 15%100+15.2Experts Score= 100Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAA– | 5.00 | $633 |
| 2 |  Dirt Cheap Sewer IncEverett, WA | A 98How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%98+57.5Reliability 26%97+25.3Value 15%100+15.2Craft & service penalty99−0.1Experts Score= 98Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAA– | 4.96 | $2.0k |
| 3 |  Magic Flow PlumbingEverett, WA | A 96How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 59%99+58.1Reliability 26%97+25.3Value 15%83+12.6Experts Score= 96Not enough data for replies to reviews; its weight is shared by the others.Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AA–AA– | 4.98 | $680 |
| 4 |  ProMax Water Heaters & PlumbingEverett, WA | A 95How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%95+51.8Reliability 24%94+22.8Value 14%100+14.1Replies to reviews 7%85+6Experts Score= 95Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.96 | $1.4k |
| 5 |  ALL WAYS ROOTER LLC Sewer & Drain, Hydro JetEverett, WA | A 93How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%97+52.9Reliability 24%96+23.3Value 14%100+14.1Replies to reviews 7%64+4.5Craft & service penalty80−2Experts Score= 93Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAB | 4.95 | $447 |
| 6 |  Price Busters Plumbing & SewerEverett, WA | A 93How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%93+50.7Reliability 24%90+21.8Value 14%99+14Replies to reviews 7%100+7.1Craft & service penalty91−0.9Experts Score= 93Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.91 | $1.1k |
| 7 |  Taylor's Plumbing Solutions, LLCEverett, WA | A 92How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%96+52.4Reliability 24%98+23.8Value 14%100+14.1Replies to reviews 7%34+2.4Craft & service penalty96−0.4Experts Score= 92Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAD | 4.94 | $705 |
| 8 | CM HeatingEverett, WA | A 92How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%92+50.2Reliability 24%91+22.1Value 14%100+14.1Replies to reviews 7%92+6.5Craft & service penalty96−0.4Experts Score= 92Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.92 | $292 |
| 9 | Eco Electric, Plumbing, Heating and AirEverett, WA | A 90How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%89+48.5Reliability 24%84+20.4Value 14%100+14.1Replies to reviews 7%100+7.1Experts Score= 90Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.90 | $1.2k |
| 10 |  Harts Plumbers, Electricians, & HVAC TechniciansEverett, WA | A 85How the Experts Score is calculatedEach factor is scored 0–100 on absolute terms (standing in the category can only raise it), then weighted; problems flagged in review highlights or a recent slide in ratings are subtracted:Satisfaction 55%85+46.4Reliability 24%82+19.9Value 14%85+12Replies to reviews 7%100+7.1Craft & service penalty96−0.4Experts Score= 85Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews. | AAAAAA | 4.88 | $731 |
What jobs cost
What customers paid, from the price Google asks reviewers to report.
| Job | Low25th percentile: 1 in 4 customers paid less than this. | TypicalMedian of the bill customers reported in their Google review (Google asks reviewers for a price range; we use the middle of each range). | High75th percentile: 1 in 4 customers paid more than this. | FairOf customers who rated the price, the share who chose “Great price” or “Reasonable” rather than “Overpriced”. |
|---|---|---|---|---|
| Plumbing pipe repair | $328 | $556 | $1.2k | 96% |
| HVAC system maintenance | $39 | $135 | $264 | 99% |
| Toilet repair | $192 | $351 | $680 | 92% |
| Plumbing leak detection | $78 | $258 | $642 | 96% |
| Drain cleaning | $161 | $317 | $502 | 95% |
| Water heater installation | $1.2k | $1.9k | $2.5k | 96% |
| Faucet repair | $166 | $351 | $542 | 95% |
| Heating system maintenance | $78 | $161 | $251 | 99% |
| Plumbing leak repair | $228 | $441 | $821 | 94% |
| A/C system maintenance | $37 | $135 | $295 | 98% |
| Faucet installation | $295 | $454 | $611 | 94% |
| HVAC system repair | $114 | $264 | $580 | 97% |
Leak Detection Services in Washington at a glance
How the 10 leak detection services we rated in Washington compare, and what customers praise most.
Experts Score grades
A = score 80+, F = below 20.
- Grade A10100%
- Grade B00%
- Grade C00%
- Grade D00%
- Grade F00%
Google ratings
Average stars per company.
- 4.90★ and up990%
- 4.80–4.89★110%
- 4.60–4.79★00%
- Below 4.60★00%
What customers praise
Share of Google review highlights.
- Quality11,51120%
- Professionalism14,00524%
- Responsiveness12,16121%
- Punctuality11,73320%
- Value8,18514%
Was the price fair?
All price verdicts left with reviews.
- Great price2,31026%
- Reasonable5,40761%
- Overpriced3814%
- Not sure7248%
Price verdicts by year
Share calling it great / reasonable / overpriced.
How we grade
Satisfaction (54%) — Recency-weighted star average (2-year half-life), shrunk toward the category mean by review volume; the company’s own lifetime average as the prior; absolute: 4.0★ = 0, 5★ = 100.
Reliability (24%) — How rarely jobs go badly: share of 1–2★ reviews — 60% the last 24 months (or the 20 newest if fewer), 40% all-time; 0% = 100, 15%+ = 0; the category percentile can only raise it.
Craft & service (penalty, up to −10) — Google review highlights: Quality, Professionalism, Responsiveness, Punctuality — how rarely reviewers flag them as a negative, per review since highlights began; 0% = 100, 5%+ = 0. Subtracted from the score (up to −10), never averaged in — clean highlights are the norm, not a bonus.
Value (14%) — Customers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.
Momentum (penalty, up to −10) — Penalises only a real slide: last-12-month average below lifetime (−0.5★ = 0). Still 4.8★+ over the last year, or steady/improving = 100. Subtracted from the score (up to −10), never averaged in.
Replies to reviews (7%) — How often the owner publicly replies to reviews under 5★ (1–4★). Needs 3+ such reviews, otherwise not counted; 65% absolute (80%+ replied = 100), the category percentile can only raise it.