iHow 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.95SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#20 of 54 leak detection servicesiPosition by Experts Score among all companies we track in this category. · better than 64%
5.0★★★★★156 Google reviews · 24 photos
98%five-star reviews
4.89★last 12 monthsiAverage stars on reviews from the last 12 months only.
1.1%1–2★ in 2 yearsiShare of 1–2★ reviews in the last 24 months — or the 20 newest reviews when the company had fewer than 20 in that time.
97%reviews answered by the owner
$1.4ktypical billiMedian bill customers of this company reported in their reviews (needs 3+ priced reviews).
Customers praise ProMax Water Heaters & Plumbing for punctual arrivals, clear communication, and reasonable pricing during water heater installations, boiler repairs, and leak fixes. Reviewers frequently highlight the team's professionalism, clean work areas, and willingness to explain system details without pressure. However, one recurring criticism involves the company's policy of requiring credit card information or upfront payment before work begins, which some customers found problematic.
Google rating: 5.0 out of 5 from 156 reviews (98% five-star).
Reviews on this page: 156 Google reviews (144 with written comments, 16 with photos).
Owner responses: the business replied to 97% of reviews.
Most recent review: November 3, 2026.
Service: Leak Detection Service serving Everett, Washington.
Data from Google, last updated November 8, 2026.
Score profile vs other leak detection services
Score per factor (100 = best)iEach factor is scored 0–100 on absolute terms (star average, share of 1–2★ reviews, price verdicts…); standing within the category can only raise it, never lower it.. Strongest: craft & service and value; weakest: replies to reviews.
This companyLeak Detection Services median0 = centre, 100 = best
SatisfactioniSatisfaction · 54% of the scoreRecency-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.ProMax Water Heaters & Plumbing: 95/100 on this factor. Category median: 94.A
95
ReliabilityiReliability · 24% of the scoreHow 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.ProMax Water Heaters & Plumbing: 94/100 on this factor. Category median: 92.A
94
Craft & serviceiCraft & service · penalty only, up to −10 pointsGoogle 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.ProMax Water Heaters & Plumbing: 100/100 on this factor. Category median: 96.A
100
ValueiValue · 14% of the scoreCustomers’ own price verdicts (Great / Reasonable vs Overpriced) and Value highlights; 65% absolute (all “reasonable” ≈ 80, “great” = 100), the category percentile can only raise it.ProMax Water Heaters & Plumbing: 100/100 on this factor. Category median: 100.A
100
MomentumiMomentum · penalty only, up to −10 pointsPenalises 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.ProMax Water Heaters & Plumbing: 100/100 on this factor. Category median: 100.A
100
Replies to reviewsiReplies to reviews · 7% of the scoreHow 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.ProMax Water Heaters & Plumbing: 85/100 on this factor. Category median: 94.A
85
Bar = this company · dark tick = category median.
Star ratings
156 Google reviews we collected
5.0of 5
5 stars15398%
4 stars21%
3 stars00%
2 stars00%
1 star11%
Praise vs complaints
Phrases our text analysis found in 144 written reviews
99%praise
Praise34399%
Complaints21%
PriceiGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.
Price verdicts customers left with their Google review
100%fair
Great price822%
Reasonable2569%
Overpriced00%
Not sure38%
$1.4k+229% vs typical leak detection services
Middle half of what 29 customers paid ($1.1k–$2.4k) · gold mark = category median.
Topic share
How often each topic comes up in the written reviews
7topics
Speed & response8424%
Staff & attitude7522%
Quality & results5516%
Would recommend5315%
Price & value3610%
Communication3410%
Honesty & trust82%
What customers talk about
We read 144 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“They responded promptly to help my family stop the water leak to prevent damage and replace the hot water tank.”
“Showed on time for appointment, reliable and knowledgeable service.”
“Evan did a great job troubleshooting our boiler and explaining what was going on.”
“We would absolutely recommend ProMax to anyone looking for plumbing services!”
“I would not recommend this company based on my experience.”
“They were able to get us scheduled quickly, and their pricing was very reasonable compared to other bids we received.”
“Super communicative, fast, and clean water heater installation.”
“They are honest, hard working, and if there is an emergency they do their best to get the work scheduled quickly.”
People customers mention
Evan33 reviews
Owen17 reviews
Todd7 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Reviews for your job
Customers hired ProMax Water Heaters & Plumbing for 8 kinds of job. Pick one to see what they paid and said.
CChristopherLocal Guide · 47 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 5 days ago★★★★★
My hot water tank was leaking while I was at work. They responded promptly to help my family stop the water leak to prevent damage and replace the hot water tank. Great communication and explained everything. No pressuring or up selling.
Paid $2,000+Great priceWater heater installation
EEileenLocal Guide · 41 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · Edited 3 weeks ago★★★★★
Made suggestions and scheduled work immediately. Showed on time for appointment, reliable and knowledgeable service. Thank you Evan with promax.
Paid $1,200–1,400Reasonable priceWater heater installationService not listed
JJames6 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · Edited a month ago★★★★★
They arrived on time, were very courteous, professional, and knew exactly what was required to fix the pipe.
Paid $400–600Great pricePlumbing pipe repairOutdoor plumbing system repair
TTodd11 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a month ago★★★★★
Will definitely recommend. Quick response and scheduling from Todd and a very professional maintenance visit with Evan. Got an appt with less than a days notice and our Rinnai tankless is back to good. Thanks!
Paid $400–600Reasonable priceWater heater repair
MMatthew7 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · a month ago★★★★★
Our tenants notified us that the water heater was leaking. I called 3 places and Evan from ProMax Water Heaters responded the fastest, provided the best estimate and was able to get to our repair the next day. Evan installed the new 40 gallon gas water heater and showed me a few things he updated and changed for…
TTimothy5 reviewsiTotal number of Google reviews this person has written across all businesses on Google Maps (not just this one). More reviews usually means a more experienced, trustworthy reviewer. · 2 months ago★★★★★
We had a water heater failure the night before and gave ProMax a call and got scheduled for the next morning. We had Evan handle our new installment. They arrived early, let me know what to expect and began working right away.
Reviews from Google, shown as published (original wording, unedited).
Jobs customers hired them for— from Google's service tags and the review text
Team members customers mention
Filter by topic— each topic is highlighted in the reviews in the same color
C
Christopher HooperLocal Guide · 47 reviewsiTotal number of Google reviews Christopher has written across all businesses on Google Maps, not just this one.
My hot water tank was leaking while I was at work. They responded promptly to help my family stop the water leak to prevent damage and replace the hot water tank. Great communication and explained everything. No pressuring or up selling.
Price assessment: Great price
Price: $2,000+
Services: Water heater installation
M
mudderjenLocal Guide · 13 reviewsiTotal number of Google reviews mudderjen has written across all businesses on Google Maps, not just this one.
I had an extremely disappointing experience with this company. From the very beginning, the owner repeatedly insisted that I put a credit card on file before any work had even been performed. Why would I provide my credit card information to a company I have never done business with?
To make matters worse, when the plumber arrived, he demanded a check upfront before starting any work. This was completely unexpected and unlike anything I have experienced in my years of dealing with contractors and service providers.
I have worked with numerous vendors and contractors throughout the industry, and I have never encountered such an approach to doing business.
This company’s lack of professionalism and overall approach to customer service were extremely disappointing. I would not recommend this company based on my experience.
E
Eileen MorganLocal Guide · 41 reviewsiTotal number of Google reviews Eileen has written across all businesses on Google Maps, not just this one.
We had a great experience with ProMax Water Heaters and plumbing! They were able to get us scheduled quickly, and their pricing was very reasonable compared to other bids we received. Owen handled our water heater replacement, and he was fantastic—friendly, knowledgeable, and great to work with. The whole process was smooth, and we really appreciated the prompt service and quality experience from start to finish. We would absolutely recommend ProMax to anyone looking for plumbing services!
Response from the owner · 4 weeks ago
Hi Amy, Glad to hear it! We appreciated installing your new water heater for you. Thanks for leaving a review and the feedback.
R
Raunaq Dhindsa4 reviewsiTotal number of Google reviews Raunaq has written across all businesses on Google Maps, not just this one.
Great service and a great guy! Would definetly reach out to Evan for any other issues in future. Process was very streamlined and he knows what he is doing. Very clean work. The water heater installation was seamless. Looked into few other things. Definitely recommend.
Response from the owner · a month ago
Hi Raunaq, Thanks for sharing your feedback here. We enjoyed getting you set up with a new Navien tankless water heater -- enjoy the endless hot water!
J
James Delissio PhD, CPM6 reviewsiTotal number of Google reviews James has written across all businesses on Google Maps, not just this one.
They arrived on time, were very courteous, professional, and knew exactly what was required to fix the pipe.
Price assessment: Great price
Price: $400–600
Services: Plumbing pipe repair, Outdoor plumbing system repair
Response from the owner · a month ago
Hi James, thanks for leaving us a review. It’s unfortunate that we couldn’t fix your pipe the first time as our trucks are stocked with most everything we need. A picture doesn’t allow us to see how big the pipe is and it turns out your water pipe is larger than most homes we work on, which is why we didn’t have the right parts. Happy to hear the repair went smoothly otherwise.
