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TRUSTED BY DIAMOND BAR, CA HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon37
    Verified water heater services reviews

Find Water heater pros in Diamond Bar

Avatar for Western Rooter & Plumbing

Western Rooter & Plumbing

4.81(
157
)
Approved Pro

Western Rooter & Plumbing

4.81(
157
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
626 local quotes requested

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


Roto-Rooter Plumbing & Water Cleanup

5.00(
5
)
Approved Pro

Roto-Rooter Plumbing & Water Cleanup

5.00(
5
)
Approved Pro
15 local quotes requested
90 years of experience

Roto-Rooter is a fully licensed and insured plumbing company providing 24/7 plumbing services, drain cleaning, and water damage cleanup. More people depend on Roto-Rooter than any other plumbing company in North America. 

Roto-Rooter is a fully licensed and insured plumbing company providing 24/7 plumbing services, drain cleaning, and water damage cleanup. More people depend on Roto-Rooter than any other plumbing company in North America. 


Avatar for Ace Pelizon Plumbing, Heating & Cooling

Ace Pelizon Plumbing, Heating & Cooling

4.59(
37
)
Approved Pro

Ace Pelizon Plumbing, Heating & Cooling

4.59(
37
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
70 local quotes requested

We have 250+ 4.8 star Google Reviews and are proud to be one of the highest rated plumbing companies in San Gabriel Valley. Ace Pelizon Plumbing offers a full range of residential and commercial plumbing services across San Gabriel Valley. With over 80 years of experience, we have earned an excellent reputation among our customers and are more than happy to prove this to you through our comprehensive plumbing solutions. Whether you are in need of simple repairs or complex installation services, Ace Pelizon Plumbing can help. We take pride in our team of highly skilled plumbers that have gone through rigorous training programs as well as, background and drug screening tests for your peace of mind. When you need the highest level of service possible, you can count on us!

"Couldn't have gone better. Joe did the job perfectly. Lots of friendly conversation and explanation of what he was doing. He then explained the bill in detail and was on his way. I definitely would ask for him personally for any plumbing issues I might have in the future."

Craig C on November 2024

We have 250+ 4.8 star Google Reviews and are proud to be one of the highest rated plumbing companies in San Gabriel Valley. Ace Pelizon Plumbing offers a full range of residential and commercial plumbing services across San Gabriel Valley. With over 80 years of experience, we have earned an excellent reputation among our customers and are more than happy to prove this to you through our comprehensive plumbing solutions. Whether you are in need of simple repairs or complex installation services, Ace Pelizon Plumbing can help. We take pride in our team of highly skilled plumbers that have gone through rigorous training programs as well as, background and drug screening tests for your peace of mind. When you need the highest level of service possible, you can count on us!

"Couldn't have gone better. Joe did the job perfectly. Lots of friendly conversation and explanation of what he was doing. He then explained the bill in detail and was on his way. I definitely would ask for him personally for any plumbing issues I might have in the future."

Craig C on November 2024


Avatar for Advanced Gen Plumbing

Advanced Gen Plumbing

5.00(
9
)
Approved Pro

Advanced Gen Plumbing

5.00(
9
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
243 local quotes requested

"As a premier plumbing and water treatment company, Advanced Gen is dedicated to delivering top-notch service to all our clients. Led by owner Nick Cannon, our team of skilled professionals is equipped to handle a wide range of services, including drain installation, emergency repairs, water heater & water filtration system installation, and more. We also offer gas line services, electric & gas water heater repair, and hot water recirculation services. We offer these exceptional services within a 30 miles radius of our base location. At Advanced Gen, we pride ourselves on our professionalism and attention to detail, ensuring that every job is completed to the highest standards. Trust us to handle all of your plumbing and water-related needs."

"Quick response, same day repair, worked within my budget, very friendly and professional! Will definitely use them again!"

Amanda P on June 2025

"As a premier plumbing and water treatment company, Advanced Gen is dedicated to delivering top-notch service to all our clients. Led by owner Nick Cannon, our team of skilled professionals is equipped to handle a wide range of services, including drain installation, emergency repairs, water heater & water filtration system installation, and more. We also offer gas line services, electric & gas water heater repair, and hot water recirculation services. We offer these exceptional services within a 30 miles radius of our base location. At Advanced Gen, we pride ourselves on our professionalism and attention to detail, ensuring that every job is completed to the highest standards. Trust us to handle all of your plumbing and water-related needs."

"Quick response, same day repair, worked within my budget, very friendly and professional! Will definitely use them again!"

Amanda P on June 2025


Avatar for HR Plumbing Services

HR Plumbing Services

5.00(
5
)
Approved Pro

HR Plumbing Services

5.00(
5
)
Approved Pro
Super Service Award
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
89 local quotes requested

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


Avatar for Austin Hill Plumbing

Austin Hill Plumbing

New on AngiNew on Angi
Approved Pro

Austin Hill Plumbing

New on AngiNew on Angi
Approved Pro
3 years of experience
Free onsite estimate

We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at Austin Hill Plumbing strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.

We have the experience and we are committed to providing quality workmanship and superior customer service on all our applications. We at Austin Hill Plumbing strive to maintain our reputation as a high quality, very service oriented company with our main focus being customer satisfaction.


Avatar for JR Plumbing Champions - Unlicensed Contractor

JR Plumbing Champions - Unlicensed Contractor

4.83(
23
)
Approved Pro

JR Plumbing Champions - Unlicensed Contractor

4.83(
23
)
Approved Pro
Customers say: Terrific value
35 local quotes requested
4 years of experience

JRC Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Highly recommend Jose for any kind of plumbing service. He is very attentive to detail and making sure the job was done the right way."

Mike L on November 2025

JRC Plumbing is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

"Highly recommend Jose for any kind of plumbing service. He is very attentive to detail and making sure the job was done the right way."

Mike L on November 2025


Arrow Tech Plumbing Mechanic

New on AngiNew on Angi
Approved Pro

Arrow Tech Plumbing Mechanic

New on AngiNew on Angi
Approved Pro
3 years of experience
Free onsite estimate

Arrow Tech Plumbing Mechanic provides exceptional service to the surrounding areas. Always taking pride in all of our services. Whatever your home improvement needs may be, you can count on our company to leave you satisfied and happy. Our customer satisfaction is our top priority. We will earn your trust for a lifetime. We believe in making all clients repeat clients. Our staff listens to your needs regarding your home improvement project. Call us today you'll be relieved you did. Thank you

Arrow Tech Plumbing Mechanic provides exceptional service to the surrounding areas. Always taking pride in all of our services. Whatever your home improvement needs may be, you can count on our company to leave you satisfied and happy. Our customer satisfaction is our top priority. We will earn your trust for a lifetime. We believe in making all clients repeat clients. Our staff listens to your needs regarding your home improvement project. Call us today you'll be relieved you did. Thank you


"I had a terrible experience with this plumbing service. I originally called them to fix a simple toilet connection leak. Instead of addressing the actual issue, they removed the entire toilet, broke the flange, and then tried to convince me it was already damaged ? even though I knew for a fact it wasn?t. To make things worse, they did not reinstall the toilet correctly. The bolt was left crooked and unstable (see photo), and the toilet was not secured the way it should be and they charged me 350$ When I called them back to fix their own mistake, they repeatedly hung up on me. I tried multiple numbers and none of them answered. Extremely unprofessional and completely irresponsible. I now have to hire another plumber to fix the damage they caused. I highly recommend avoiding this service ? they caused more problems than they "

Mina D on November 2025

From conception to completion we work with you until the job is done. We thrive to take care of all of our clients unique needs. We are ethical, honest and easy to communicate with. Call us today you'll be pleased you did. Thank you

"I had a terrible experience with this plumbing service. I originally called them to fix a simple toilet connection leak. Instead of addressing the actual issue, they removed the entire toilet, broke the flange, and then tried to convince me it was already damaged ? even though I knew for a fact it wasn?t. To make things worse, they did not reinstall the toilet correctly. The bolt was left crooked and unstable (see photo), and the toilet was not secured the way it should be and they charged me 350$ When I called them back to fix their own mistake, they repeatedly hung up on me. I tried multiple numbers and none of them answered. Extremely unprofessional and completely irresponsible. I now have to hire another plumber to fix the damage they caused. I highly recommend avoiding this service ? they caused more problems than they "

Mina D on November 2025


"They were prompt in responding to the initial inquiry and answering questions. We had an original install date, but they had forgotten to put it in the book, so we rescheduled for another day. Price was higher than what I wanted to spend, but it was still reasonable compared to other quotes. They were prompt, courteous, and efficiently completed the job. I would recommend them for any project that you have."

Dean S on March 2025

With several years experience, 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.

"They were prompt in responding to the initial inquiry and answering questions. We had an original install date, but they had forgotten to put it in the book, so we rescheduled for another day. Price was higher than what I wanted to spend, but it was still reasonable compared to other quotes. They were prompt, courteous, and efficiently completed the job. I would recommend them for any project that you have."

Dean S on March 2025

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Water Heaters questions, answered by experts

Unless they are connected to the same system, boilers and water heaters will both need their own expansion tanks. The only case they wouldn’t have separate expansion tanks is if the boiler is pulling double duty and managing a heating system while also supplying hot water for a home. In which case, you may not need a hot water heater.

You can convert a gas heater to electric, but it isn’t as simple as swapping a plug or two. First of all, you need to make sure there’s adequate power to the unit, as electric units require much higher power amounts versus gas. Then, you need to close off the gas lines and ventilation. Make sure you don’t also need a permit for an electric water heater—some cities require it. Making the switch can cost upwards of $1,500.

If you want instant hot water and to reduce water waste while improving convenience, a hot water recirculating system is worth it, especially if you find your hot water heater is not hot enough. These systems can save thousands of gallons of water each year so you don't have to wait for hot water at faucets and showers. The upfront investment can be high, especially for systems requiring additional plumbing, but the long-term savings on water bills and added comfort make them a worthwhile upgrade.

Venting a gas water heater out of the roof is preferable in most cases. Heated exhaust gases naturally rise, so a vertical vent pipe is efficient. If you’re trying to vent through a pipe exiting a wall, the angle of the pipe may be more horizontal than vertical, making the venting system less effective. If you go through a wall, you may need to add a fan to ensure a successful expulsion of the gases outdoors.

Any item that can hold on to moisture and encourage mold growth should be discarded and replaced following water damage. Upholstered items, such as armchairs and couches, and soft items, such as mattresses, usually must be thrown away once they've taken on a lot of water. Soft furniture is difficult to dry out, creating an inviting environment for mold.

You may also need to replace hardwood furniture following water damage if you're unable to fully dry it out. If you have appliances and electronics that have been fully submerged in water, particularly sewage, you'll need to replace those, too.

The Diamond Bar, CA homeowners’ guide to water heater services

From average costs to expert advice, get all the answers you need to get your job done.