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Top-Rated Water softener pros in Central Islip - Updated Nov 2026

Avatar for Simply PUR Water Filtration
Simply PUR Water Filtration
5.0(
39
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Central Islip, NY and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Simply PUR recently installed a whole house water filtration/softening system, along with an RO system, in my home and did an amazing job. My experience with Vincent and his wife Claudia throughout the whole process was wonderful. They thoroughly explained the system, the installation process, and answered all my questions. The install went smooth, and Vincent even took care of a flawed plumbing trap previously done. What I appreciated most was how Vincent assured me he would continue to follow-up with me on when I should check my salt levels, change my filters, and if there are any updates with the equipment. I now have piece of mind knowing I'm providing clean and safe drinking water to my family. Thanks Simply PUR!!!"
Pentair Fresh Point 575M
Pentair Fresh Point 575M
Farmingville Home
East Williston Home
East Chester Home

+94

Response time1 day
Response rate89%
29 neighbors recently requested a quote
Avatar for Long lsland Clean Water Service, Inc.
Long lsland Clean Water Service, Inc.
4.6(
67
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Central Islip, NY and surrounding areas

Approved

In business since 1985

Free estimates

Emergency services offered

"From the sales representative, Anthony, to the owners Mark and Madelyn, our family's experience with this company was impeccable. They showed such care and compassion once they found out that the Long Island's hard water in our home caused our 5 month old skin to breakout so badly. She was in such distress and they went above and beyond the call of duty to ensure that the water system was installed ASAP. The installers were so considerate that they even removed their shoes while working in our kitchen, without us asking them to do so. They worked efficiently and were very thorough. Jennifer who handles the office matters, was a pleasure to work with. As she rightfully texted me, It takes a village to raise a child and we truly are blessed to be a part of this water family. We rewashed the baby's clothes and you can immediately feel the difference and the natural products that can only be ordered through the company will save us tons of money from household cleaning supplies to bodywash everything is all natural. I have already convinced my pastors to have the system installed in their new long island home and will continue to recommend this company to everyone I can. Worth every single penny!"
Bypass
Whole House Water Filtration System with UV Filter
Reverse Osmosis
Reionator Pro Ultra
Reionator Pro Ultra

+6

Response time2 days
8 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for All Weather Heating & Cooling
All Weather Heating & Cooling
4.5(
70
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Central Islip, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"I called All Weather to give me a quote for replacing my gas boiler. They set up a time for their salesperson to come over and give me a quote. The appointment was only a few days later and a man named Joe showed up on time. He spent some time with me, I told him I was looking for a new boiler and a new hot water heater, but I wanted to see what options I have (since I was debating going to a tankless water heater). He told me going indirect hot water tank is the best option and they always use this brand that's the "best one out there". Even though he may have been right, he didn't tend to my questions or concerns very well. I felt like he was getting annoyed that I had questions and eventually I just let him run the show just to get him out of my house faster. Especially when he gave me a quote of $8600, it was much higher than I was anticipating. One thing I really didn't like was when he said I'd have to get a permit since I live in an incorporated village, which would be an extra $500, meanwhile I already had another plumber tell me a permits only $200. So I went with another company. So even though I can't rate All Weather on their work quality, I didn't get a good feeling from their salesperson."
Additional Photos
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+13

Response time3 days
7 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for AquaFlow Plumbing Heating & Water Systems
AquaFlow Plumbing Heating & Water Systems
5.0(
10
)
Water Treatment & Purification System - Install or Replace

Serving Central Islip, NY and surrounding areas

Approved

In business since 2020

Free estimates

Small jobs welcome

"I moved into my new home on 7/8 and knew I needed to replace the 20 year old hot water heater. The water was warm in the shower and brown. Originally, I planned on getting a tankless unit, but that was prohibitively expensive and not allowed in my community. Taking the next prudent steps, I secured my three estimates. Not only was AquaFlow the least expensive, but when I met Enrique, I knew I wanted to work with him on this project and all future plumbing issues. He explained what needed to be done, secured the tank from the supply dealer, and showed up at 9:00 AM promptly as promised. It was originally planned to be a two man job, but the other person couldn’t make it. Enrique did the entire job on his own. I was amazed. He worked until 5:00 PM. I asked why he didn’t just reschedule with me, but he stuck to the date and time he gave me. He also installed my new touch-less faucet and adjusted the cartridge in the shower and I now can take hot (not warm) showers."
Project Photos
Projects done
Projects done
Projects done
Projects done

+5

1 neighbors recently requested a quote
Avatar for Santise Plumbing & Heating, LLC
Santise Plumbing & Heating, LLC
5.0(
4
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Central Islip, NY and surrounding areas

Approved

In business since 2020

Small jobs welcome

Credit card accepted

Licensed and insured Master Plumber with over 10 years of experience in the plumbing industry, we are the experts you need to take care of your home or business. We handle everything from remodels to water heaters. We will treat your home as we would treat our own. Give Santise Plumbing & Heating a call today, we look forward to working with you!

Boiler x-209
Boiler - x-209
1
2
1

+1

Response time4 hrs
Recommended by100%of homeowners
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Water Softeners FAQs, answered by experts

It’s not a good idea to oversize your water softener. Doing so will mean the tank doesn’t get full, which can lead to channeling. This leads to a large portion of the resin beads not being utilized and the beads at the bottom of the tank being overused. Over time, this will reduce the efficiency of your system, not to mention that the upfront cost of an oversized softener is unnecessarily high. If you have a timed regeneration cycle rather than a demand-based one, you’ll also spend far more on replacing salt than you need to.

Most of the U.S. has hard water, especially across portions of the West and Midwest. The areas with the hardest water include parts of Texas, Oklahoma, Kansas, Colorado, New Mexico, Utah, Wyoming, Illinois, North and South Dakota, Ohio, and New York. You’ll find soft water in parts of New England, the Southeast, the Pacific Northwest, and Hawaii.

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.

The main difference between a water softener and a water filter is what they remove from the water. A water softener is specifically designed to remove hard minerals, while a filter removes a wider range of contaminants above a certain size, such as bacteria and other impurities. If your primary goal is to remove minerals, a softener is the best choice. If you want to remove various contaminants for safety or taste, a filter is more suitable. Filters are also typically less expensive to install. Depending on your water supply's specific issues, you may need to install both systems for comprehensive treatment.

If your ‘do isn’t doing what you want it to do despite using good hair care products, hard water might be to blame. Since hard water can’t rinse soap off as well as soft water can, your hair might grow limp because of the shampoo and conditioner residue that’s left behind. If you color your hair, you might see it fade more quickly or even turn a different shade as the dye reacts with the minerals in the water. You might also experience an itchy scalp, thanks to the dryness that comes from bathing in the hard water.

The Central Islip, NY homeowners’ guide to water softener services

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