Top-rated water softener pros.

Best water softener pros near Diamond Bar, CA

Enter your zip and get matched with up to 5 pros

Need a pro for your water softener service project in Diamond Bar, CA?

Select your specific project to find the pro for you.

TRUSTED BY DIAMOND BAR, CA HOMEOWNERS

  • Average homeowner rating star icon5
    Average homeowner rating
  • Verified reviews icon10
    Verified water softener services reviews

Top-Rated Water softener pros in Diamond Bar - Updated Nov 2026

Avatar for Western Rooter & Plumbing
Western Rooter & Plumbing
4.8(
172
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"Found me the right size water heater, a few days before Thanksgiving and had it installed within 2 hours. Clean and efficient and Bradford White gas water heaters are American made. Built to last. Daniel Westereng did a great job with the install. Clean, fast, thorough and polite."
Ruben installs a new drainage system under a customers home. Working in a crawl space is rough, but we do what is needed.
Backing up? Got roots? Blast those roots out with a Hydro Jetter! We use a wart hog nozzle that combines controlled rotation with a unique 8 jet cutting configuration optimized for removing roots. It’s better with a jetter! Call us! We got this! ??
Sewer Line Camera
No drain clog too big or small, Western Rooter covers them all!
Justin clearing a Kitchen sink back-up after the Memorial holiday.
HALO 5 whole house water filtration system.

+542

Response time12 hrs
Response rate100%
9 neighbors recently requested a quote
Avatar for Pure Water Filtration
Pure Water Filtration
5.0(
5
)
Water Treatment & Purification System - Install or Replace

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

With 50 years of combined experience, we at Pure Water Filtration pride ourselves on being the best in the industry. Our ability to design and install complex projects separates us from our competitors. We do everything from simple installs such as residential reverse osmosis to more complex commercial multi-unit apartment buildings or well water treatment. For pure, healthy water, we have a solution for any budget. We use American-made products, allowing us to offer the best warranties in the industry. All of our products meet NSF and ANSI standards. Pure Water Filtration has a close relationship with the California State Drinking Water Program and local testing laboratories. We guarantee you will be satisfied when choosing Pure Water Filtration as your go-to water treatment specialist.

Plumbing Project
Water softener replacement
Commercial Water Softener and Carbon system
Unidyne Water Softener and Carbon Combo system
Water Softener and Backwashing Carbon system

+3

23 neighbors recently requested a quote
Avatar for ROOTER ER & PLUMBING INC
ROOTER ER & PLUMBING INC
4.6(
24
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"I was in dire need of a plumber because the valve that adds water to my pool was broken and it would not shut off. We had to shut off the water to my house to prevent flooding of the pool. Enter Rooter ER & Plumbing to the rescue. He was extremely knowledgeable about what was required just by looking at the picture I sent over the phone. He gave me options and quite reasonable prices. Doing the work, he was extremely efficient and thorough. He would not stop until it was up to a standard that he expected of himself for his own home. When I went out to look at/inspect his work, he was extremely patient and he explained to me everything that he had done and the benefits of getting this done. Being a complete novice in the realm of plumbing, I was extremely grateful for him taking the time to explain this to me. I was extremely happy with his work, and I would recommend him to anyone that needs a friendly neighborhood plumber."
tankless water heater uo to code
storm drain
same as above
gas line install
gas line install

+6

Response time11 hrs
Response rate94%
4 neighbors recently requested a quote
Avatar for Service Champions Plumbing, Heating & AC
Service Champions Plumbing, Heating & AC
4.4(
50
)
Water Treatment & Purification System - Install or Replace

Serving Diamond Bar, CA and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"We are in the process of having both our dirty & clean water lines completely changed, which is a huge project. Several of the great Service Champion technicians have had to dig huge holes & long trenches, with the additional obstacle of having to cut through huge roots, from an enormous tree in front of our house, that have literally taking over our front yard & destroyed the pipes. They also cut through cement & even â  jackhammeredâ  through an enormous patch of concrete that was about a foot deep, which took a lot of time & muscle to remove! This was definitely an amazing example of â  good deeds for freeâ  . We had so many different, excellent technicians coming & going, who did a tremendous job for us, but I unfortunately cannot remember everybodyâ  s names. There are two guys who actually have been working at our house the most, so Iâ  d like to recognize them (big Chris & Ryan). They are both terrific examples of the Service Champions model, and are excellent in their trade! They have worked very hard & have been a great help in so many different ways, helping to make this difficult process much easier for our family! Kudos & our deepest thanks to Chris & Ryan & all the great Service Champions professionals! We sincerely appreciate you all!"
Area Drain Cleaning
Plumbing
Plumbing
Garbage Disposal
Drain Cleaning

+13

Response time4 hrs
Recommended by79%of homeowners
...
Showing 1-10 of 108
Water Softeners FAQs, answered by experts

A good hardness level for drinking water can vary based on personal preferences, but an ideal level is 3.5 to 7 GPG. This means your water isn’t soft or hard. However, some people prefer the “fresh” taste from the minerals in hard water, while others like the smoother, “slippery” texture of soft water.

Selecting the right system depends on testing your water to understand the contaminants present and considering your household's water usage and specific needs, such as removing specific contaminants.

The average cost to install a water softener, including the system and labor, is approximately $1,500. However, the total price can range widely from $600 to $6,000. For some complete systems, the cost may be between $800 and $2,500. Labor for the installation typically costs between $150 and $1,000.

The final price is influenced by several factors, including:

  • System type, capacity, and complexity

  • Home size and household water demands

  • Water hardness levels

  • Accessibility of the installation site and the extent of plumbing work required

  • Whether new electrical work is needed

  • The professional hired and any local permit costs

You can decide whether you need a water softener or water filter based on how your bathing or laundry experience is. If you notice issues like limescale buildup, dry skin, or stains on dishes—all telltale signs of hard water—you'd likely benefit from a water softener. However, if your main concern is over chemicals or bacteria in your tap water filter, and not just comfort, a filter is a better option.

Experts recommend that you put two to four bags of potassium chloride in your water softener every month. This amount depends on how much is in the bag (40 pounds is most common) and what your water softener manufacturer recommends. For more specific advice, talk to a water softener pro in your area and read the manual that came with your system.

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

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