
Get matched with top boiler installation pros in Diamond Bar, CA
There are 39 highly-rated local boiler installation pros.
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TRUSTED BY DIAMOND BAR, CA HOMEOWNERS
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Average homeowner rating919
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Verified Reviews for Boiler Installation pros in Diamond Bar, CA
*The Angi rating for Boiler Installation 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 Boiler Installation needs.
*The HomeAdvisor rating for Boiler Installation 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 Boiler Installation needs.
Last update on October 06, 2025
Find Boiler installation pros in Diamond Bar

Western Rooter & Plumbing
Western Rooter & Plumbing
Call NOW: (626) 889-7990! Available 24/7 for all your plumbing needs! At the heart of our services is a commitment to comprehensive plumbing solutions - from water, sewer, to gas lines, we handle it all. Our expertise spans routine maintenance to urgent emergency repairs, ensuring your plumbing is always in top condition. Drain cleaning? We're on it with both traditional and hydro jetting techniques. But that's just the start. We offer water heater services, including both classic and cutting-edge tankless installations, repairs, and maintenance, ensuring your hot water flow is uninterrupted. Our approach to clean, safe water extends to installing water treatment systems, including softeners and filtration, for pure, drinkable water right from your tap. We're also proactive about the health of your plumbing and sewer lines, offering detailed inspections with our sewer scope technology. Many maintenance services come with complimentary camera inspections to extend your system's lifespan and pinpoint any issues early on. Gas lines and safety valves, especially emergency earthquake shutoffs, are within our expertise, along with certified under street repairs. And for those with septic systems, we provide thorough septic pumping services. No matter the challenge - water, sewer, or gas lines - we're fully equipped to tackle it. Plus, we're thrilled to extend our free travel zone, now covering the Victorville area, bringing our reliable services closer to you!
"Ryan was perfectly on-time and was a plumbing scholar and a gentleman. We had a simple drain replacement under a new sink. Going to Western saved me at least another day of trying to figure out proper parts and doing the install myself, and it also saved my wife's ears from hearing my salty language."
Gary V on September 2024
Call NOW: (626) 889-7990! Available 24/7 for all your plumbing needs! At the heart of our services is a commitment to comprehensive plumbing solutions - from water, sewer, to gas lines, we handle it all. Our expertise spans routine maintenance to urgent emergency repairs, ensuring your plumbing is always in top condition. Drain cleaning? We're on it with both traditional and hydro jetting techniques. But that's just the start. We offer water heater services, including both classic and cutting-edge tankless installations, repairs, and maintenance, ensuring your hot water flow is uninterrupted. Our approach to clean, safe water extends to installing water treatment systems, including softeners and filtration, for pure, drinkable water right from your tap. We're also proactive about the health of your plumbing and sewer lines, offering detailed inspections with our sewer scope technology. Many maintenance services come with complimentary camera inspections to extend your system's lifespan and pinpoint any issues early on. Gas lines and safety valves, especially emergency earthquake shutoffs, are within our expertise, along with certified under street repairs. And for those with septic systems, we provide thorough septic pumping services. No matter the challenge - water, sewer, or gas lines - we're fully equipped to tackle it. Plus, we're thrilled to extend our free travel zone, now covering the Victorville area, bringing our reliable services closer to you!
"Ryan was perfectly on-time and was a plumbing scholar and a gentleman. We had a simple drain replacement under a new sink. Going to Western saved me at least another day of trying to figure out proper parts and doing the install myself, and it also saved my wife's ears from hearing my salty language."
Gary V on September 2024

Harmony Electrical, Plumbing and Air
Harmony Electrical, Plumbing and Air
Harmony Electrical, Plumbing and Air is dedicated to delivering exceptional electrical, plumbing and Air services tailored to meet the unique needs of each client. Our mission is to ensure reliability and quality through customized solutions, supported by a team of highly skilled and experienced technicians who are always prepared to provide outstanding service. We are committed to your satisfaction and will not consider the job complete until it meets our high standards. Our pride lies in the quality of our work and our commitment to excellent customer service. Explore the range of services we offer below, and feel free to call or click to schedule your free estimate today!
"Tyler was excellent and Brian was very accommodating for my schedule. I would definitely use them in the future."
Pixie B on September 2025
Harmony Electrical, Plumbing and Air is dedicated to delivering exceptional electrical, plumbing and Air services tailored to meet the unique needs of each client. Our mission is to ensure reliability and quality through customized solutions, supported by a team of highly skilled and experienced technicians who are always prepared to provide outstanding service. We are committed to your satisfaction and will not consider the job complete until it meets our high standards. Our pride lies in the quality of our work and our commitment to excellent customer service. Explore the range of services we offer below, and feel free to call or click to schedule your free estimate today!
"Tyler was excellent and Brian was very accommodating for my schedule. I would definitely use them in the future."
Pixie B on September 2025

Payless Water Heaters & Plumbing Inc
Payless Water Heaters & Plumbing Inc
Payless Water Heaters provides Same day water heater Installation & Repair services. We also can install a New Tankless Water Heater the same day. We understand how important hot water is to your daily routine - Our team has over 30 years of combined industry-leading experience, which gives us greater insight into locating root problems and providing customized solutions. Unlike some technicians, we carefully survey the unit before starting any repairs. This allows us to accurately address the issue and create lasting solutions. As a Family owned and Locally operated business, we have deep roots in the community. Our mission is simple - provide the ultimate customer experience. This means always being on time, being professional, and being available, With upfront, honest pricing, and no extra charge for nights or weekends - If you're ready to get started, call (888)461-8249 if you need some help.
"Better than excellent. David was great. He explained all options, answered questions, completed the job faster than expected, and when it is time to replace my heater I will call on David and only David."
Georgia T on September 2025
Payless Water Heaters provides Same day water heater Installation & Repair services. We also can install a New Tankless Water Heater the same day. We understand how important hot water is to your daily routine - Our team has over 30 years of combined industry-leading experience, which gives us greater insight into locating root problems and providing customized solutions. Unlike some technicians, we carefully survey the unit before starting any repairs. This allows us to accurately address the issue and create lasting solutions. As a Family owned and Locally operated business, we have deep roots in the community. Our mission is simple - provide the ultimate customer experience. This means always being on time, being professional, and being available, With upfront, honest pricing, and no extra charge for nights or weekends - If you're ready to get started, call (888)461-8249 if you need some help.
"Better than excellent. David was great. He explained all options, answered questions, completed the job faster than expected, and when it is time to replace my heater I will call on David and only David."
Georgia T on September 2025

Highspeed Plumbing
Highspeed Plumbing
High Speed Plumbing is a veteran and family-owned/operated business dedicated to operating at “High Speed” in the military sense. That means that we’re always highly motivated and working at peak efficiency! Solving your plumbing problems effectively and affordably is our top priority, and we have the skills, experience, and attitude needed to do so.
"Ron was a true professional in diagnosing and fixing the issue."
Solomon P on May 2023
High Speed Plumbing is a veteran and family-owned/operated business dedicated to operating at “High Speed” in the military sense. That means that we’re always highly motivated and working at peak efficiency! Solving your plumbing problems effectively and affordably is our top priority, and we have the skills, experience, and attitude needed to do so.
"Ron was a true professional in diagnosing and fixing the issue."
Solomon P on May 2023

Marvelous Plumbing
Marvelous Plumbing
Marvelously performing plumbing jobs for homes and business across many cities, making life easier. Restoring flow and life back to homes and businesses is truly a rewarding feeling. Marvelous Plumbing is a full service company that protects the health and safety of this nation. Marvelous Plumbing aims to achieve 5-star service by providing quality parts and transparency.
"I have used Marvelous Plumbing for years. Gilbert is friendly and knowledgeable when it comes to plumbing. He explains everything and gives back to his community."
Alan O on February 2025
Marvelously performing plumbing jobs for homes and business across many cities, making life easier. Restoring flow and life back to homes and businesses is truly a rewarding feeling. Marvelous Plumbing is a full service company that protects the health and safety of this nation. Marvelous Plumbing aims to achieve 5-star service by providing quality parts and transparency.
"I have used Marvelous Plumbing for years. Gilbert is friendly and knowledgeable when it comes to plumbing. He explains everything and gives back to his community."
Alan O on February 2025

Rapid Rescue Rooter & Plumbing
Rapid Rescue Rooter & Plumbing
Here at Rapid Rescue Rooter & Plumbing we prioritize serving our customers with pride, integrity, and attention to the details that matter most to you. So, why choose Rapid Rescue Rooter? That?s easy!! We have unmatched client service along with 21 years of plumbing and drain service experience. Let us earn your business, you?ll be a client for life. Call now for assistance with any plumbing or drain problems,
"Wesley was extremely responsive. He made all efforts allowing us to continue doing our business at home while he was assessing the problem, assembling his crews, and obtaining a City permit. We were well informed of the progress. His crew did an excellent and clean job, working long hours getting the job done. Including excavated to a depth of 10 feet, patched up our concrete driveway and patched up the AC roadway nicely. Wesley even found time to replace our kitchen faucet and under drain without extra charge. Don’t believe he would be the cheapest initial estimate you would get. We would definitely ask him for all future plumbing needs."
Ferdy C on February 2025
Here at Rapid Rescue Rooter & Plumbing we prioritize serving our customers with pride, integrity, and attention to the details that matter most to you. So, why choose Rapid Rescue Rooter? That?s easy!! We have unmatched client service along with 21 years of plumbing and drain service experience. Let us earn your business, you?ll be a client for life. Call now for assistance with any plumbing or drain problems,
"Wesley was extremely responsive. He made all efforts allowing us to continue doing our business at home while he was assessing the problem, assembling his crews, and obtaining a City permit. We were well informed of the progress. His crew did an excellent and clean job, working long hours getting the job done. Including excavated to a depth of 10 feet, patched up our concrete driveway and patched up the AC roadway nicely. Wesley even found time to replace our kitchen faucet and under drain without extra charge. Don’t believe he would be the cheapest initial estimate you would get. We would definitely ask him for all future plumbing needs."
Ferdy C on February 2025

Super Marco Plumbing & Rooter
Super Marco Plumbing & Rooter
We are a Family Owned Business here at Super Marco Plumbing we offer Free estimates to All our Customers. We service All Plumbing Services and Drains.
"I just wanna talk about Marco. He’s fantastic. Very fine gentleman. He do a very good job appreciating thank you and thank you. Have a good day."
Douglas M on August 2025
We are a Family Owned Business here at Super Marco Plumbing we offer Free estimates to All our Customers. We service All Plumbing Services and Drains.
"I just wanna talk about Marco. He’s fantastic. Very fine gentleman. He do a very good job appreciating thank you and thank you. Have a good day."
Douglas M on August 2025

HR Plumbing Services
HR Plumbing Services
HR Plumbing Services is your trusted partner for all your plumbing needs. Whether you need a simple faucet repair, a drain cleaning, or a water heater installation, we have the skills and experience to handle any plumbing project. We are a veteran/family-owned and operated business that has been serving the Santa Ana community and greater Orange County area. We are licensed, insured, and bonded, and we offer estimates, competitive pricing, and 100% satisfaction guarantee. We are available 24/7 for emergency plumbing services, and we use the latest technology and equipment to ensure quality workmanship. Contact HR Plumbing Services today to schedule your plumbing service and see why we are the best plumbers in Santa Ana. Let us make sure your life is flowing freely and low stress today. We are bilingual and speak Spanish.
"They fixed a link under my sink. They arrived on time and were able to get the problem all fixed. Very professional and courteous."
Larry B on January 2024
HR Plumbing Services is your trusted partner for all your plumbing needs. Whether you need a simple faucet repair, a drain cleaning, or a water heater installation, we have the skills and experience to handle any plumbing project. We are a veteran/family-owned and operated business that has been serving the Santa Ana community and greater Orange County area. We are licensed, insured, and bonded, and we offer estimates, competitive pricing, and 100% satisfaction guarantee. We are available 24/7 for emergency plumbing services, and we use the latest technology and equipment to ensure quality workmanship. Contact HR Plumbing Services today to schedule your plumbing service and see why we are the best plumbers in Santa Ana. Let us make sure your life is flowing freely and low stress today. We are bilingual and speak Spanish.
"They fixed a link under my sink. They arrived on time and were able to get the problem all fixed. Very professional and courteous."
Larry B on January 2024

The Sewer Surgeon
The Sewer Surgeon
The Sewer Surgeon is available 24/7 for emergency assistance. As one of our residential or commercial clients, you can expect a guarantee on work and parts, OSHA compliant and certified employees, and free estimates and second opinions. Contact us today for prompt assistance from a friendly, reliable plumber.
The Sewer Surgeon is available 24/7 for emergency assistance. As one of our residential or commercial clients, you can expect a guarantee on work and parts, OSHA compliant and certified employees, and free estimates and second opinions. Contact us today for prompt assistance from a friendly, reliable plumber.
The Diamond Bar, CA homeowners’ guide to boiler installation services
From average costs to expert advice, get all the answers you need to get your job done.
Tankless water heater costs depend on the size of your water heater, location, fuel type, and more. Keep reading to calculate your expenses.
Looking to replace or upgrade your water heater? Use this water heater replacement cost guide to see what the work will cost and what factors affect your total.
Running out of hot water too quickly or hearing strange noises when you call for hot water? Use this water heater repair cost guide to see what a fix will cost.
Testing a water heater thermostat starts with shutting off the power and using a multimeter. Follow this guide on how to test your water heater thermostat.
The number of people, flow rate, and water temperature in your home will help you calculate what size tankless water heater you need. This guide walks you through it.
Hybrid water heaters will have you weighing high initial costs versus long-term savings. Is it the right option for you? Explore the pros and cons of hybrid water heaters.
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