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Water treatment & purification system installers and replacers in Mission Viejo

Avatar for CUSTOM H 2 0
CUSTOM H 2 0
801 W. Lambert Rd
5.00(
30
)
Approved Pro
CUSTOM H 2 0
801 W. Lambert Rd
5.00(
30
)
Approved Pro
Customers say: True professional
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
44 local quotes requested

CUSTOM H 2 0 is your area leader for all of your water treatment needs. We know customer service is key to a job well done, and ours is the best around. When you want top quality work at an always fair price, call the professionals at CUSTOM H20. We are an independent company. This allows us to provide the highest quality water treatment equipment and service at very discounted prices. Thank you.

"Custom H2O does a significant amount of large commercial projects and rely mostly on word of mouth. Many of their clients include hospitals, so the equipment they sell is very high performance. I spoke with the president, Chris over the phone about initial details on what I am looking for in a water softener. After that, Chris made a point to schedule a visit to see the house and plumbing before proceeding. He looked over the overall layout, checked the water pressure, and took detailed measurements before advising us on our installation options and products. The discussion focused on key concepts like different substances carbon and resin filter out, not about sales gimmicks or overselling. After the initial quote, Chris actually called to hold off the installation for a week to take advantage of an upcoming manufacturer rebate. Their knowledge, experience, and integrity speak volumes."

Andy L on April 2025

CUSTOM H 2 0 is your area leader for all of your water treatment needs. We know customer service is key to a job well done, and ours is the best around. When you want top quality work at an always fair price, call the professionals at CUSTOM H20. We are an independent company. This allows us to provide the highest quality water treatment equipment and service at very discounted prices. Thank you.

"Custom H2O does a significant amount of large commercial projects and rely mostly on word of mouth. Many of their clients include hospitals, so the equipment they sell is very high performance. I spoke with the president, Chris over the phone about initial details on what I am looking for in a water softener. After that, Chris made a point to schedule a visit to see the house and plumbing before proceeding. He looked over the overall layout, checked the water pressure, and took detailed measurements before advising us on our installation options and products. The discussion focused on key concepts like different substances carbon and resin filter out, not about sales gimmicks or overselling. After the initial quote, Chris actually called to hold off the installation for a week to take advantage of an upcoming manufacturer rebate. Their knowledge, experience, and integrity speak volumes."

Andy L on April 2025


Avatar for McCowin Water, Inc.
McCowin Water, Inc.
15791 Rockfield Boulevard, Suite O
4.87(
26
)
Approved Pro
McCowin Water, Inc.
15791 Rockfield Boulevard, Suite O
4.87(
26
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
53 years of experience

We do not install only, products do need to be purchased from us. Since 1972 McCowin Water has PROVEN reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project and deliver the PERFECT system for YOU! We look forward to earning your business! WE LOVE HELPING PEOPLE.

"Honest about not being able to solve my problem"

Howard M on March 2022

We do not install only, products do need to be purchased from us. Since 1972 McCowin Water has PROVEN reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project and deliver the PERFECT system for YOU! We look forward to earning your business! WE LOVE HELPING PEOPLE.

"Honest about not being able to solve my problem"

Howard M on March 2022


Avatar for Pristine Plumbing, Inc.
Pristine Plumbing, Inc.
16 Technology Drive, Suite 141
4.38(
43
)
Approved Pro
Pristine Plumbing, Inc.
16 Technology Drive, Suite 141
4.38(
43
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
43 local quotes requested

Pristine Plumbing, Inc., is your go to plumbing professional. We have years of experience to provide world class service and will work with you to ensure your complete satisfaction with every project. Call today to schedule an appointment! (949) 317-4077.

"The installation was very efficient and the crew did an excellent job in regards to the plumbing hookups and testing. I highly recommend this company and would use them for future projects. I want to comment that this job was in a second floor condominium with very steep stairs and no elevator. To those who wonder how a very heavy 50 gallon water heater is naviga!ted down those stairs without scarring the newly painted walls, l can only say they managed perfectly. No dings anywhere. Good job guys"

Robert N on October 2024

Pristine Plumbing, Inc., is your go to plumbing professional. We have years of experience to provide world class service and will work with you to ensure your complete satisfaction with every project. Call today to schedule an appointment! (949) 317-4077.

"The installation was very efficient and the crew did an excellent job in regards to the plumbing hookups and testing. I highly recommend this company and would use them for future projects. I want to comment that this job was in a second floor condominium with very steep stairs and no elevator. To those who wonder how a very heavy 50 gallon water heater is naviga!ted down those stairs without scarring the newly painted walls, l can only say they managed perfectly. No dings anywhere. Good job guys"

Robert N on October 2024


Avatar for Flow Tech Plumbing
Flow Tech Plumbing
304 Terra Bella
5.00(
9
)
Approved Pro
Flow Tech Plumbing
304 Terra Bella
5.00(
9
)
Approved Pro
1 years of experience
Free onsite estimate

We take great pride in our experience, expertise, quality and customer service, that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate, with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

"62-year-old shower drain under concrete slab needed to be replaced. Taylor got it all done, great job on the shower pan, drain set properly and all ready for tile. Work completed on schedule and on budget. "

Wes G on April 2025

We take great pride in our experience, expertise, quality and customer service, that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate, with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

"62-year-old shower drain under concrete slab needed to be replaced. Taylor got it all done, great job on the shower pan, drain set properly and all ready for tile. Work completed on schedule and on budget. "

Wes G on April 2025


Avatar for Mr Rooter Plumbing
Mr Rooter Plumbing
430 North State College Blvd
4.50(
2
)
Approved Pro
Mr Rooter Plumbing
430 North State College Blvd
4.50(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
23 local quotes requested

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. Our only priority is to provide the highest level of customer service. We know that plumbing emergencies are enough of a headache without dealing with an ornery customer service rep or repairman. We offer a warm voice, a courteous call, and a convenient process. We make your emergency a priority for us, scheduling service as quickly as possible to resolve your problem. Our plumbers are the same way—they treat your home with respect and consideration. We wipe our feet on our own mats, we wear shoe covers before entering your home, and we’ll offer you a fair assessment of your plumbing situation and how much it will cost to handle it. Our prices are flat-rate and upfront, so you don’t have to worry about inflating prices as the job goes on.

"Contacted Mr. Rooter on a Saturday and they quickly sent Dave and his assistant. Dave diagnosed the problem, provided a couple of solutions (after discussing each with me) and once we settled on a plan-of-attack, he got right to it. Dave was great! He fixed the problem, the cost was reasonable and they cleaned up after themselves. I highly recommend Mr. Rooter. (P.S.- ask for Dave)."

Ron B on July 2024

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. Our only priority is to provide the highest level of customer service. We know that plumbing emergencies are enough of a headache without dealing with an ornery customer service rep or repairman. We offer a warm voice, a courteous call, and a convenient process. We make your emergency a priority for us, scheduling service as quickly as possible to resolve your problem. Our plumbers are the same way—they treat your home with respect and consideration. We wipe our feet on our own mats, we wear shoe covers before entering your home, and we’ll offer you a fair assessment of your plumbing situation and how much it will cost to handle it. Our prices are flat-rate and upfront, so you don’t have to worry about inflating prices as the job goes on.

"Contacted Mr. Rooter on a Saturday and they quickly sent Dave and his assistant. Dave diagnosed the problem, provided a couple of solutions (after discussing each with me) and once we settled on a plan-of-attack, he got right to it. Dave was great! He fixed the problem, the cost was reasonable and they cleaned up after themselves. I highly recommend Mr. Rooter. (P.S.- ask for Dave)."

Ron B on July 2024


Avatar for Bill Metzger Plumbing
Bill Metzger Plumbing
1001 Calle Recodo
4.69(
77
)
Approved Pro
Bill Metzger Plumbing
1001 Calle Recodo
4.69(
77
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
25 local quotes requested

Family owned and operated we take a great sense of pride in the quality of work performed and customer experience. If you are looking for a professional you can trust to do the job correctly, call or visit our website today.

"Excellent"

Adam W on April 2025

Family owned and operated we take a great sense of pride in the quality of work performed and customer experience. If you are looking for a professional you can trust to do the job correctly, call or visit our website today.

"Excellent"

Adam W on April 2025


Avatar for Olson Superior Plumbing, Inc.
Olson Superior Plumbing, Inc.
19 Spectrum Pointe Drive, Suite 604
5.00(
7
)
Approved Pro
Olson Superior Plumbing, Inc.
19 Spectrum Pointe Drive, Suite 604
5.00(
7
)
Approved Pro
Customers say: Quick response
16 years of experience
Free onsite estimate

At Olson Superior Plumbing, we believe in putting People Over Plumbing. With 4,000+ five-star reviews on Yelp and Google, and as a family-owned and operated business serving Orange County and surrounding areas, our team brings over 15 years of experience in delivering high-quality plumbing solutions with care, integrity, and unmatched professionalism. Whether you're dealing with a leaky faucet, a full repipe, or need emergency service, our licensed and insured technicians are here to help—treating every home and customer with the respect and compassion they deserve. We hold ourselves to the highest standards, ensuring your job is done right the first time, every time. Driven by our C.A.R.E. values—Compassion, Accountability, Respect, and Excellence—we’re not just here to fix pipes. We’re here to build trust, provide peace of mind, and create long-term relationships with the homeowners we serve. Experience plumbing with heart. Experience Olson Superior Plumbing.

"Ordered the job on Friday and the job was started and completed on the same day ! Affordable- on time- professional- would and will hire again for all my plumbing jobs at home 10/10 !"

Stephen E on April 2025

At Olson Superior Plumbing, we believe in putting People Over Plumbing. With 4,000+ five-star reviews on Yelp and Google, and as a family-owned and operated business serving Orange County and surrounding areas, our team brings over 15 years of experience in delivering high-quality plumbing solutions with care, integrity, and unmatched professionalism. Whether you're dealing with a leaky faucet, a full repipe, or need emergency service, our licensed and insured technicians are here to help—treating every home and customer with the respect and compassion they deserve. We hold ourselves to the highest standards, ensuring your job is done right the first time, every time. Driven by our C.A.R.E. values—Compassion, Accountability, Respect, and Excellence—we’re not just here to fix pipes. We’re here to build trust, provide peace of mind, and create long-term relationships with the homeowners we serve. Experience plumbing with heart. Experience Olson Superior Plumbing.

"Ordered the job on Friday and the job was started and completed on the same day ! Affordable- on time- professional- would and will hire again for all my plumbing jobs at home 10/10 !"

Stephen E on April 2025


Avatar for Barker and Sons Plumbing, Inc.
Barker and Sons Plumbing, Inc.
3900 East Miraloma Avenue
4.25(
8
)
Approved Pro
Barker and Sons Plumbing, Inc.
3900 East Miraloma Avenue
4.25(
8
)
Approved Pro
Customers say: Quick response
40 local quotes requested
45 years of experience

At Barker and Sons Plumbing & Rooter, we are a dedicated team of professionals with over 35 years of experience who provide the best customer service and the most current technologies across Orange County! We are proud to offer a complete range of plumbing, drain and sewer services. Whether you need drain cleaning, water heater repairs, trenchless "no dig" sewer replacement, pipe leak detection or any other plumbing services, you can trust our highly trained plumbers. We know plumbing emergencies can happen at any time, that's why we have real people answering our phones and ready to help as quick as possible. We are excellent communicators and will call and text you 30 minutes prior to our arrival so feel free to go about your day.

"They showed up with short notice on a Friday Night. It was urget as our gas was turned off by the Gas Company, and we did not want to go without gas over the weekend with a sick elderly person in the home. The Technician had the problems fixed within an hour."

Kathy W on April 2023

At Barker and Sons Plumbing & Rooter, we are a dedicated team of professionals with over 35 years of experience who provide the best customer service and the most current technologies across Orange County! We are proud to offer a complete range of plumbing, drain and sewer services. Whether you need drain cleaning, water heater repairs, trenchless "no dig" sewer replacement, pipe leak detection or any other plumbing services, you can trust our highly trained plumbers. We know plumbing emergencies can happen at any time, that's why we have real people answering our phones and ready to help as quick as possible. We are excellent communicators and will call and text you 30 minutes prior to our arrival so feel free to go about your day.

"They showed up with short notice on a Friday Night. It was urget as our gas was turned off by the Gas Company, and we did not want to go without gas over the weekend with a sick elderly person in the home. The Technician had the problems fixed within an hour."

Kathy W on April 2023


Avatar for Apex Plumbing Incorporated
Apex Plumbing Incorporated
3625 Whieldon Drive
5.00(
8
)
Approved Pro
Apex Plumbing Incorporated
3625 Whieldon Drive
5.00(
8
)
Approved Pro
Customers say: Quick response
5 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"They did a great job and really went above and beyond my expectations. You won't make a mistake if you hire them for your job."

Linda B on April 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"They did a great job and really went above and beyond my expectations. You won't make a mistake if you hire them for your job."

Linda B on April 2025


Avatar for Western Rooter & Plumbing
Western Rooter & Plumbing
136 E Santa Clara St
4.81(
157
)
Approved Pro
Western Rooter & Plumbing
136 E Santa Clara St
4.81(
157
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
581 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

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Water treatment & purification system installations and replacements FAQs

In a reverse osmosis system, water from your main line—or from a designated faucet—is pushed through a semipermeable membrane under pressure. The membrane’s microscopic pores trap dissolved solids, heavy metals, and other contaminants, while clean water passes into a storage tank or straight to the tap. The leftover concentrated water simply drains away. The result is clear, great‑tasting water delivered right where you need it.

A plumber can set up a point‑of‑use unit in one to two hours. A whole‑house system is more involved and often takes one to two days because it ties into the main supply line and may need extra plumbing. During installation, the pro mounts the unit, connects the pipes, checks for leaks, and tests performance so you’re ready to pour a glass as soon as they leave.

Reverse osmosis removes dissolved solids, heavy metals, and many microorganisms, giving you water that tastes cleaner and protects your family. Softer water also helps appliances, faucets, and ice makers last longer. Because you’re filling reusable bottles instead of buying single‑use plastic, most homeowners save money and cut waste. In short, you get better‑tasting water, longer‑lasting appliances, and a smaller environmental footprint from one straightforward system.

The homeowners guide to water treatment & purification system installations and replacements
From average costs to expert advice, get all the answers you need to get your job done.
reverse osmosis water filtration system
Apr 23, 2025
Apr 23, 2025
Budget for reverse osmosis water filter costs based on factors such as system type, efficiency, number of stages, labor, add-on features, and more.
water purification filter system in home
Apr 17, 2025
Apr 17, 2025
The cost of installing a whole-house water filtration system depends on the type and number of filters you choose. Use this guide to budget for your project.
A small girl washing her hands in the bathroom sink
Mar 25, 2025
Mar 25, 2025
Use this guide to budget for water softener repair costs based on factors such as water treatment system type, replacement parts, professional labor, and more.
A woman holding glass under faucet in kitchen
Feb 12, 2025
Feb 12, 2025
If you’re planning to install a water softener, consider budgeting based on capacity, type of system, tank size, and more.
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