
Plumbing, Emergency Plumbing, Modern Plumbing , and 3 more
"Great service and work from Miguel and team. I would hire them again. What originally was a slow draining sewer line turned into a root infested backup. Miguel was able to scope the drain and visualize the root of the problem. They were prepared to start digging and had the tools and supplies on the truck to get the job completed. He clearly explained the discovery, repair, and installation process as well as potential other root intrusion spots. After the dig, the soil and grass was replaced and can hardly tell that any work was done. They also cleaned the dirt/mud on the concrete walk way. Thank you Miguel and team for the great work."
C74DB3546EE5C57C63F5CF31C7AA5E9AD6078DB5243BB2CAF29B9FD78BAB6957 B. in December 2025

HVAC NEEDS, Plumbing, Performance Air Conditioning , and 1 more
"I recently had the pleasure of working with Authority Plumbing, and I cannot recommend them highly enough. From the outset, they came to my home with a plan that demonstrated their deep understanding of plumbing challenges. Clayton, the technician assigned to my project, was exceptional. He took the time to listen to my concerns and opinions, making sure that I felt heard and valued. He explained each step, ensuring I was comfortable with the plan before proceeding. When a sub-contractor was brought on to streamline the process started making several errors, Clayton quickly took charge of the situation. They fixed these mistakes, alongside resolving my initial drainage issues, at no additional expense, was truly remarkable. The team demonstrated a genuine commitment to ensuring the work was completed to the highest standard. Thanks to their efforts, my plumbing issues have been resolved. I would not hesitate to recommend them to anyone in need of professional plumbing services."
AB684F47244A0CD28AF45256BEB426A4F6473444084C8DE5CE96E4E7803186A5 1. in October 2025

Plumbing Service, Plumbing, Faucets, Fixtures and Pipes - Repair or Replace , and 12 more
"Jeremy was friendly and great and nice. My heat was not sustaining to stay on once it started. This is an old HVAC system. He was efficent, very professional and cleaned up after himself. He explained everything he was doing and showed me what needed to be fixed. He made sure the parts were the correct ones needed to fix the problem before he changed them out. He also let me know some issues I might be running into in the future but there was no pressure that they needed to be done right now. I felt the prices were right for 2 parts that either failed or were failing. The other was optional and I decided to change it out. I would request Jeremy again if my unit had issues in the future. The heat is now working great."
KAREN W. in November 2024

Plumbing, I do a lot of different plumbing jobs, my expertly is unclogging any drain in your house or business., Plumbing , and 1 more
"Jose provided excellent service. He communicated and shared photos and videos proactively. He solved the problem and also offered a 60 day warranty on his work."
36B87FB00A886549CDF169C1B9A4EEB59C63E0433CCF5E62A04CEC70F010377A 4. in September 2025
plumbing, Plumbing, 10% off for first time customers
"Very professional, always on time. Would hire them again"
Linda S. in December 2022

Residential Plumbing, Commercial Plumbing
"Great company! They will be the first I call next time I need any plumbing work done."
Richard M. in December 2019

"Jeffery did a great job with installation of 3 toilets and other plumbing work. I just wish I could find him again, his contact number changed 😔."
Candy B. in November 2024
slab leaks, leak detection, water heaters , and 2 more
"The pro was very nice and did very quality work. I would highly recommend him."
Paul B. in December 2017

Sewer Camera Inspections and Trenchless Sewer Repair, Certified Tankless W/H Installers - Nortiz, Navien, Rheem and Rinnai, Water Heater Repair and Installation Experts , and 2 more
"I had a break in my water main, leaking about a half-gallon per minute (720 gallons/day). By the time the water company inspector left, it was almost noon and I still had to find a plumber. Do It Right Plumbers scheduled me for immediate service, and Dakota was at my home that same afternoon. He restored the water service to my home, while bypassing the water main. This stopped the leak and allowed me and my family to go on with our day as if there was no water main problem. He explained my options and gave me exact prices. A lot of digging was needed, there were complications, and extra labor and hours were needed because the burst pipe was underneath the sidewalk. All of the dirt was shoveled on to protective tarps. When the water needed to be shut off, the down times were really brief. When everything was done, Dakota had not only replaced the water main, but also the water pressure regulator, the hose faucet, and all of the connections and valves. Then he replaced all of the dirt, re-planted the shrubs that had been removed during the job, and left the area looking as if nothing had happened. As for the final price, it was very fair, and exactly as he had quoted---not a penny more! I had a water main break before, and I remember how disruptive, expensive and stressful the last job was. Dakota really took a lot of the pain out of this latest ordeal. As hard as Dakota worked on the job, he worked equally hard to make this job as easy on me and my family as possible. If any future plumbing needs arise, I will be calling Do It Right Plumbers."
Jeff T. in October 2022
Diamond Bar Plumbers are rated 4.8 out of 5 based on 1615 reviews of 1615 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
If you're looking for Clear Sewer Main Contractors that serve a different city in California, here are some popular suggestions:
Select the problem(s) you are having with your sewer system.
If there is a sewage sump pump (for a drain lower than the sewer line), is it operating?
What kind of location is this?
Find out how HomeAdvisor can help your business