How 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%90+49.1Reliability 24%90+21.8Value 14%100+14.1Replies to reviews 7%73+5.2Craft & service penalty90−1Experts Score= 89Grade A: A = 80+, B = 60–79, C = 40–59, D = 20–39. Needs 10+ reviews.89SCOREJB Plumbing
Duarte, CA · Grade ALetter from the Experts Score: A = 80+, B = 60–79, C = 40–59, D = 20–39, F = under 20. · #8Position by Experts Score among all companies we track in this category. of 10 repiping services · 4.9★ from 469 Google reviews
Report card
Percentile vs other repiping services (100 = best)Each 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: value and momentum; weakest: replies to reviews.
Reviews for your job
Customers hired JB Plumbing for 8 kinds of job.
JB Plumbing for plumbing pipe repair
Clear ✕All 60 Google reviews tagged “Plumbing pipe repair” · showing 20
Cory and his crew just finished doing a total repipe and full replacement of all lines to the street. They are a great company. They are very professional, work clean, and are very knowledgeable in all things plumbing!! Everything is great!! Highly recommend to everyone!! Thank you Cory and crew 🤗👍
Great bunch of guys. Clean, pleasant and professional. Young Phillip took charge and lead his crew excellently. Made sure I was happy with everything. Johnny came originally and explained everything they would do and they did everything as explained and more. Highly recommend using them
Cory was great with JB Plumbing. He responded quickly. He kept me informed of the work required & the price quoted was reasonable
The staff at JB Plumbing are great! We had a plumbing issue arise late on a Friday and they were quick to answer their phone and sent a team out the very next morning. The staff they sent out were thorough and kind, as well as professional and considerate. Not only that they responded to another issue less than a…
Johnny is the best excellent service and gets the job done! highly recommended. He is very knowledgeable and respectful
We have had many things fixed with JB Plumbing and they are always reliable, on time and offer reasonable prices while getting the job done.
Johnny did all the work we agreed upon, plus he found some more problems that he fixed for us. Thank you.
11/10 stars! JB Plumbing in San Dimas did an excellent job fixing a couple of leaky valves under my sinks. They handled everything professionally, were friendly, and made me feel like I could completely trust them in my home. It is hard to find people who are both trustworthy and professional, but JB Plumbing…
Cory and his crew were amazing! We had leak in the slab of our kitchen/hallway floor, Cory inspected the leak, communicated our options and we had a quote shortly thereafter. All the work was done in few days. He pulled the city permits for the plumbing and even had a technician here during the inspection to answer…
UPD: 5/18/26 JB came out for another job replacing the standpipe after the washing machine kept backflowing after trying to drain. Plenty of drywall cutting and other major work. Cost was exactly 1/3 of what another large plumbing company quoted me. They got right on the job, ,finished quickly and did awesome work.…
JB Plumbing came out & did a re-pipe of my 2 story house, installed a new water tank/ heater & a soft water system. Cory & his crew were amazing. Very kind, clean & courteous. Respected my time & property. They also replaced a faucet in my kitchen. I highly recommend JB to my family & friends. The person they…
Great to work with.
Johnny and son were very professional. They identified the problem- quickly and offered a fair price. The repair was completed to satisfaction and I thank them for their kindness during the repair.
Johnny and his team go above and beyond to make sure you are satisfied and your plumbing is working smoothly! I highly recommend their services and have been using them for years - Johnny is always super fast to respond to my texts and calls and I truly consider him as a great service! From plumbing on my…
Amazing Company - reliable, efficient, trustworthy.
Excellent experience. Punctual, professional, courteous. Great job.
Fast, efficient and a pleasure doing business with. I would definitely recommend them to a friend!
Looking for the nostalgic and rare experience of a knowledgeable, reliable, trustworthy and reasonably priced plumber… one who takes care like a family member would? Job: full home repipe Jonny M. runs a tight ship and he and his crew really know what they’re doing! First time customer referred by a neighbor, and I…
Excellent workmanship. Johnny supervised the job from the start to finish. His crew were superb and professional. We're very satisfied and would recommend them to anyone.
We had a gas leak and Cory came out to service our pipes the same day. He was very perfessional and kind. He was also able to find other leaks. Another worker came out to help Cameron, both got the leaks fixed and cleaned up afterwards. Great guys.
Price
Bar = middle half of what customers paid · gold mark = category median.
Price verdictsGoogle asks reviewers whether the price was great, reasonable or overpriced; these are their answers.
Jobs customers hired them for
| Job | Reviews | Category typical |
|---|---|---|
| Plumbing pipe repair | 60 | $214–$1.4k |
| Plumbing leak detection | 52 | $205–$638 |
| Drain cleaning | 50 | $104–$353 |
| Plumbing leak repair | 33 | $228–$1.7k |
| Toilet repair | 32 | $56–$380 |
| Faucet repair | 27 | $39–$457 |
| Outdoor plumbing system repair | 26 | $450–$1.7k |
| Faucet installation | 22 | — |
