4.5 
1.3k+ *The Angi rating for Affordable Plumbing companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Affordable Plumbing needs.
*The HomeAdvisor rating for Affordable Plumbing companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Affordable Plumbing needs.
Last update on May 26, 2026
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2016
Free estimates
Emergency services offered
"The plumbers arrived on time and were there until job was done to our satisfaction."
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1981
Free estimates
Emergency services offered
"Very honest, trustworthy and inexpensive plumbing company. I had three total estimates for the work and the other two companies just seem to want to charge as much as possible and do more work then was needed. I highly recommend Western Rooter and ask for Ryan, he’s the best!"
+542
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"Plumber John from JIG Plumbing was professional, efficient, and hard-working. We were very pleased with the final result."
+8
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2007
Emergency services offered
Warranties offered
"Do it Right Plumber is the best plumber I experienced so far. Their technician Mr. Dakota Dulmage is so knowledgeable, reliable and responsible. Their efficiency to my project is another reason I highly recommend this plumber to my friends. I sure will hire this professional plumber for all my future plumbing projects."
+1
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2011
Free estimates
Credit card accepted
"Donâ  t forget to get your tankless water heater flushed and a new filter output in yearly. MVP does this for us every year. They do an excellent job. Great customer service and nice plumbers/technicians."
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2013
Free estimates
Emergency services offered
"Daniel was very helpful and knowledgeable he was able to get the job done on time and good price I would recommend him for your plumbing needs ."
+16
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2022
Free estimates
Emergency services offered
Welcome to AMZ Plumbing. We work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2021
Free estimates
Emergency services offered
"When Jose came over, I thought I was dealing with a simple clogged tub. But after a thorough inspection — including camera footage and detailed explanations — he showed me the real issue: severely rusted and narrowed pipes, blocked over time by calcium and debris. It was far more serious than I expected, and honestly, something I couldn’t afford to fully replace, because 2 of my family members passed and I was financially depleted. But here’s the part that makes Jose so special: he approached the situation with genuine compassion, patience, and care. He didn’t just see a job — he saw a person who was struggling, and he went above and beyond to help me in a way that was fair and kind. His empathy truly moved me. If you need a plumber who is not only skilled and professional but also deeply human — someone who shows up when you feel like no one else will — I wholeheartedly recommend Jose. He is reliable, honest, and the kind of person you’ll be grateful to have in your corner."
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Athen was responsive, quick, professional, and efficient. He even cleaned up the work areas once he was done. Would definitely contact this company again for plumbing needs in the future!"
+2
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"We’ve had so many plumbing projects over the years and have always used Rapid Rescue. They have replaced our water heater, completely plumbed two bathrooms & worked on the house mainline as well as the gas line and hooking up the water lines for the washer & dryer. They are honest, reliable and affordable. The work they have done has been top notch and it lasts. I highly recommend Wes and Rapid Rescue for all of your plumbing needs."
+18
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