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 59%96+56.3Reliability 26%91+23.7Value 15%100+15.2Experts Score= 95Not 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.95SCORE
AGradeiLetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20.
#5 of 10 repiping servicesiPosition by Experts Score among all companies we track in this category. · better than 56%
5.0★★★★★139 Google reviews · 24 photos
99%five-star reviews
5.00★last 12 monthsiAverage stars on reviews from the last 12 months only.
1.6%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.
100%reviews answered by the owner
$748typical billiMedian bill customers of this company reported in their reviews (needs 3+ priced reviews).
Customers consistently praise Isaac & Sons Plumbing for punctual arrivals, clear communication, and professional execution of services like drain clearing, water heater installation, and leak repair. Reviewers highlight the team's efficiency, transparent explanations of work, and reasonable pricing as key factors in their satisfaction. One lower-rated review noted a lack of proactive communication regarding a delayed arrival and questioned the cost of a faucet installation.
Google rating: 5.0 out of 5 from 139 reviews (99% five-star).
Reviews on this page: 139 Google reviews (116 with written comments, 4 with photos).
Owner responses: the business replied to 100% of reviews.
Most recent review: August 27, 2026.
Service: Repiping Service serving Duarte, California.
Data from Google, last updated October 26, 2026.
Score profile vs other repiping 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: reliability.
This companyRepiping 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.Isaac & Sons Plumbing San Dimas: 96/100 on this factor. Category median: 94.A
96
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.Isaac & Sons Plumbing San Dimas: 91/100 on this factor. Category median: 91.A
91
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.Isaac & Sons Plumbing San Dimas: 100/100 on this factor. Category median: 100.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.Isaac & Sons Plumbing San Dimas: 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.Isaac & Sons Plumbing San Dimas: 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.Not enough reviews for this factor yet. Category median: 89.–
–
Bar = this company · dark tick = category median.
Star ratings
139 Google reviews we collected
5.0of 5
5 stars13799%
4 stars00%
3 stars11%
2 stars11%
1 star00%
Praise vs complaints
Phrases our text analysis found in 116 written reviews
98%praise
Praise27998%
Complaints52%
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 price633%
Reasonable950%
Overpriced00%
Not sure317%
$748+90% vs typical repiping services
Middle half of what 11 customers paid ($227–$1.9k) · gold mark = category median.
Topic share
How often each topic comes up in the written reviews
7topics
Speed & response6021%
Staff & attitude5921%
Quality & results5319%
Would recommend3914%
Price & value2710%
Communication248%
Honesty & trust228%
What customers talk about
We read 116 written reviews and marked every phrase about these topics. The same colors are highlighted in the reviews.
“Their team worked efficiently, maintained full transparency throughout the process, and clearly walked us through every step of the completed work.”
“Isaac quickly addressed our outdoor valve and recommend his response time, work quality and professionalism.”
“Isaac & Sons Plumbing did an exceptional job servicing our home.”
“In my opinion, cost was excessive and plumber did not fix the problem and I had to call him back to correct.”
“I highly recommend their team for reliable, top-tier plumbing services!”
“His pricing is fair is his workmanship is excellent.”
“He explained the issue and was able to fix the problem quickly.”
“Isaac and his crew are very reliable and do amazing work.”
People customers mention
Issac7 reviews
Joseph5 reviews
Chris3 reviews
praise complaint · found by our text analysis, Google review wording unchanged.
Reviews for your job
Customers hired Isaac & Sons Plumbing San Dimas for 7 kinds of job. Pick one to see what they paid and said.
veronica3 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. · 3 months ago★★★★★
Called and Issac and he showed up on schedule. The job was completed fast and well explained before the work began. Great attitude. Definitely putting this company on my go to list for my home.
Paid $200–400Reasonable priceService not listed
Bruce2 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. · 3 months ago★★★★★
Joseph Came out to see what was needed and found a leak and replacement of the water heater. We were very impressed with the work that he did
T4 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. · 4 months ago★★★★★
Isaac quickly addressed our outdoor valve and recommend his response time, work quality and professionalism. I highly recommend him!!!
Paid $1,400–1,600Great priceService not listed
HeatherLocal Guide · 49 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. · 6 months ago★★★★★
I contacted Isaac & Sons after not getting my plumber to follow up with installing faucets and drains. Isaac & Sons were quick to respond and schedule an estimate. It was expensive to hook up a bath faucet, two drains, and open the shower faucet to see if could be replaced, but I needed the work completed. The…
Paid $700–800Not sureService not listed
MitchellLocal Guide · 406 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. · 6 months ago★★★★★
Exceptional service, great communication, and stellar work quality.
New 50 gal Bradford white with new flex lines and gas shut off with sediment p trap. Also installed new circ pump from bottom of water heater to master shower in 3/4 pex. Also we clear up solar connections and added all new ball valves for bypass…
goochesmomLocal Guide · 19 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. · 9 months ago★★★★★
I’ve used Isaac and sons for years and they’re always reliable and professional. Joshua did the work and is very experienced and kind
Isaac & Sons Plumbing did an exceptional job servicing our home. Their team worked efficiently, maintained full transparency throughout the process, and clearly walked us through every step of the completed work. They were remarkably communicative from start to finish and left the workspace completely spotless. I highly recommend their team for reliable, top-tier plumbing services!
Response from the owner · a month ago
Thank you Samantha we appreciate the opportunity to serve you!
Elizabeth Rios2 reviewsiTotal number of Google reviews Elizabeth has written across all businesses on Google Maps, not just this one.
I highly recommend Issac & Sons. He was friendly and helpful. He explained the issue and was able to fix the problem quickly. I would definitely use this company again!
Price assessment: Great price
Response from the owner · 3 months ago
Hi Elizabeth,
Thank you so much for your wonderful review! We’re thrilled to hear that you found our service friendly and helpful, and that we were able to quickly resolve your issue. Your recommendation means a lot to us, and we look forward to serving you again in the future!
veronica becerra3 reviewsiTotal number of Google reviews veronica has written across all businesses on Google Maps, not just this one.
Called and Issac and he showed up on schedule. The job was completed fast and well explained before the work began. Great attitude. Definitely putting this company on my go to list for my home.
Price assessment: Reasonable price
Price: $200–400
Services: Service not listed
Response from the owner · 3 months ago
Hi Veronica,
Thank you so much for your fantastic review! We’re thrilled to hear that Isaac was able to provide timely service and explain the work before getting started. Your kind words about our team's attitude mean a lot to us. We’re looking forward to being your go-to plumbing service in the future!
Tim Prutow3 reviewsiTotal number of Google reviews Tim has written across all businesses on Google Maps, not just this one.
I have used Isaac for multiple jobs. Isaac and his crew are very reliable and do amazing work. If you are looking for a plumber big or small job would highly recommend using Isaac.
Price assessment: Great price
Services: Drain cleaning
Response from the owner · 3 months ago
Hi Tim,
Thank you so much for your wonderful review! We're thrilled to hear that you've trusted us for multiple jobs and found our team reliable and our work amazing. Your recommendation means a lot to us, and we look forward to helping you with any plumbing needs, big or small, in the future. Thanks again for choosing Isaac & Sons Plumbing!
Liz Santana4 reviewsiTotal number of Google reviews Liz has written across all businesses on Google Maps, not just this one.
Isaac did an excellent job in trouble shooting some issues with water pressure and temperature. He was very knowledgeable and professional. I found his rates to be very reasonable. Highly recommend.
Response from the owner · 3 months ago
Hi Liz,
Thank you so much for your wonderful review! We're thrilled to hear that Isaac was able to troubleshoot your water pressure and temperature issues effectively. It's great to know you found his knowledge and professionalism valuable, as well as our rates reasonable. We appreciate your recommendation and look forward to assisting you again in the future!
Peter Pallesen1 reviewiTotal number of Google reviews Peter has written across all businesses on Google Maps, not just this one.
Hi Peter,
Thank you so much for taking the time to leave a review! We are thrilled to hear that you were satisfied with the sewer line repair service. Your support means a lot to us, and we look forward to assisting you with any future plumbing needs.
Bruce Reigner2 reviewsiTotal number of Google reviews Bruce has written across all businesses on Google Maps, not just this one.
Joseph Came out to see what was needed and found a leak and replacement of the water heater. We were very impressed with the work that he did
Price assessment: Reasonable price
Price: $2,000+
Services: Water heater installation
Response from the owner · 3 months ago
Hi Bruce,
Thank you for your wonderful review! We're thrilled to hear that Joseph was able to quickly identify the leak and assist with the replacement of your water heater. Your satisfaction with our work means a lot to us. We appreciate your support and look forward to serving you again in the future!
T ROSS4 reviewsiTotal number of Google reviews T has written across all businesses on Google Maps, not just this one.
Isaac quickly addressed our outdoor valve and recommend his response time, work quality and professionalism. I highly recommend him!!!
Price assessment: Great price
Price: $1,400–1,600
Services: Service not listed
Response from the owner · 4 months ago
Hi T Ross,
Thank you so much for your kind words and for taking the time to share your experience! We’re thrilled to hear that you were pleased with our quick response, work quality, and professionalism regarding your outdoor valve. Your recommendation means a lot to us. We look forward to assisting you again in the future!
Dottie Anderson7 reviewsiTotal number of Google reviews Dottie has written across all businesses on Google Maps, not just this one.
Hi Dottie,
Thank you for your fantastic review! We're thrilled to hear that you felt both jobs were completed with knowledge and confidence. Our team takes great pride in delivering quality service, and your feedback reaffirms our commitment. We look forward to serving you again in the future!
Heather PonceLocal Guide · 49 reviewsiTotal number of Google reviews Heather has written across all businesses on Google Maps, not just this one.
I contacted Isaac & Sons after not getting my plumber to follow up with installing faucets and drains. Isaac & Sons were quick to respond and schedule an estimate. It was expensive to hook up a bath faucet, two drains, and open the shower faucet to see if could be replaced, but I needed the work completed. The plumber was very nice and worked hard to do everything in a couple of hours. I may get multiple estimates next time, some plumbers do not return calls.
Price assessment: Not sure
Price: $700–800
Services: Service not listed
Response from the owner · 6 months ago
Hi Heather,
Thank you for your fantastic review! We're glad to hear that our team was responsive and that you were pleased with the work done on your faucets and drains. We appreciate your honesty about the cost and understand the importance of finding the right fit for your plumbing needs. We look forward to helping you with any future projects and ensuring a smooth experience every time!
