Whole House PAC Series

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Salt Softener & Carbon Combo System (1-3 Bath)

The Pentair PAC Series is our premium combination system designed to minimize the effects of hard water scale buildup while also reducing chemicals commonly used in municipal drinking water. The PAC Series dual-tank system packs a punch against the foul odor and the taste of too much chlorine and is ideal for homes with moderate to very hard water.
  • Carbon filtration system can reduce negative effects of chlorine, resulting in softer skin and shinier hair
  • Equipped with a prefilter to capture sediment to limit dirt and debris from reaching your tap
  • Prevents hard water scale buildup in plumbing and appliances, helping to increase their efficiency and lifespan
  • 2 unique models to choose from to meet the demands of your home based on your home size (number of bathrooms)
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Salt Softener & Carbon Combo System (1-3 Bath)
Salt Softener & Carbon Combo System (1-3 Bath)


Benefits of a Carbon Filter and Water Softener Combo System

If you experience the negative of effects of chlorine and hard water, you are likely not fully enjoying the water in your home. These negative effects might include: foul taste and odor from chlorine, dry, itchy skin when you get out of the shower, spotty dishes and glassware, dingy and stiff laundry, or prematurely broken water heaters and persistent scaling. What if there was a combination home water system to reduce these effects, resulting in better tasting, more refreshing water, giving you the peace of mind to enjoy your water? Allow us to introduce the PAC Series: a carbon filter and water softener combination system with a prefilter. This whole home system can transform your water into chug-worthy, worry-free water without the telltale odor and taste of chlorine or effects of hard water. Additional features include:

  • Simple, electronic system for easier programming
  • Only regenerates when needed, saving salt and water
  • Comes with a 5 micron prefilter to reduce sediment and debris from your water
  • Singular rotary disc seal means longer product life and less maintenance
  • Remote monitoring and low-salt level alert when paired with the Connected Salt Level Sensor and the Pentair Home App
  • Maintains settings during power outages

Reduce Chlorine Taste and Odors


Improve Appliance Efficiency


Reduce Scale Buildup


Enjoy Peace of Mind

How it works

3 stage system

5 Micron Prefilter System

The prefilter system reduces debris, sand, silt and sediment in the water supply down to 5 microns (imagine 20 times smaller than a human hair) in size. The prefilter helps protect plumbing and water-using appliances from excess sediment, increasing their effectiveness. With average use, the prefilter will last approximately 6-9 months before needing replacement.

Carbon Filtration

Occurs when water passes through the media tank that is filled with activated carbon media. This reduces chlorine in a chemical reaction that oxidizes the carbon surface. It reduces the chlorine taste and odor from the water, delivering fresh water to the home. The carbon media will need to be cleaned and reactivated on a regular basis through engaging the backwash cycle.


Occurs when water passes through the mineral tank where positively-charged calcium and magnesium ions are exchanged with sodium onto the negatively-charged resin beads. The calcium and magnesium are retained on the media within the resin tank while the remainder of the water with sodium ions flows into the home, resulting in softened water. Eventually, all sodium ions are exchanged with the magnesium and calcium and the resin beads fill with calcium and magnesium and need to be regenerated.


The mineral tank is recharged with sodium from the brine tank solution and displaces calcium and magnesium, which is flushed down the drain during the backwashing phase.


At the end of the regeneration process, this stage is a final removal of the hardness ions and dirt that have accumulated in the mineral tank and flushes to the drain.


The mineral tank is rinsed with fresh water and loads the brine tank so that it is ready for the next softening cycle.


Backwashing cycles are controlled by the electronic meter on the top of the system’s tank. The backwash cycle can be set to a specified number of days or as the electronic head recognizes that a certain amount of water has been used.

Compare Water Softening Solutions

    Whole House PAC Series
Whole home solution
Ideal for water coming from city (or municipal) water supply
Ideal for treating well water
On-demand water regeneration reduces waste water   X
Multiple sizes available for any size home   X
Indoor/Outdoor Installation   X
Material   Fiberglass
Includes a salt-based water softener   X
Reduces foul taste and odor associated with chlorine   X
Includes prefilter   X
Electronically programmable   X
Optional Connectivity to Pentair Home App when paired with the Connected Salt Level Sensor   X
Effective on Hard to Moderately Hard Water   X



Item #ImageHome Size (number of Bathrooms)Softening TechnologyTreatment TechnologyInlet Connection TypeMaximum Capacity (grains)Media Volume (cubic feet)Diameter {in}Flow Rate (gpm)Est. Filter LifeWater ProblemConforms To Spec.
PAC4 1 to 3 Salt-Based Softening & Filtration Salt-Based, Carbon NPT, Male 48600 1.5 10.25 11.9 Municipal Water - 60 months, Well Water - 12 months Chlorine Taste & Smell, Hard Water NSF/ANSI 44, 372 & CSA B483.1
PAC7 4 to 6 Salt-Based Softening & Filtration Salt-Based, Carbon NPT, Male 64000 2.0 12 13.2 Municipal Water - 60 months, Well Water - 12 months Chlorine Taste & Smell, Hard Water NSF/ANSI 44, 372 & CSA B483.1

What’s Included

  • 5 Micron Prefilter & Mounting Bracket
  • Water Softener System
  • Brine Tank
  • Filtration Tank with Carbon Media System
  • Electronic Valve Controls
  • Fittings
  • Owner’s Manual / Installation Guide  

Installation Information

Installation Recommendation: Professional Installation

Location: Indoor/Outdoor. If installing outdoors, this system should not be installed in direct sunlight without the presence of a weather cover accessory (sold separately). System should not be installed in an area that is exposed to freezing temperatures. See Owner’s Manual for details.

Additional Needs: Block Salt or Solar Salt

Connected Salt Level Sensor

The Simple Don’t-Forget-the-Salt Solution

Man installing pentair connected salt sensor

Ready to make last-minute salt runs a thing of the past. Check salt levels anytime, anywhere by adding a Connected Salt Level Sensor and the Pentair Home app to your setup. Only for salt-based water softener systems.

  • Simple in-app instructions get you activated right away
  • Universal brine tank clip fits most side-by-side and softener models
  • Provides intuitive alerts to your phone when your salt level is running low
  • WiFi & Bluetooth® wireless technology enabled*

Water Education Center

Soft water doesn’t have to be hard. Learn about what causes hard water and identify solutions to help reduce the related water woes.

Learn About Hard Water

We’re shining a spotlight on hard water’s relationship with laundry and how you can achieve fresher, fluffier, right-out-of-the-dryer clothes with softer water.

Learn More

Beyond taste and odor, the volatile chemical nature of chlorine means it can react and form potentially harmful byproducts. But, how much chlorine is ‘safe’?

Learn About Chlorine

Learn more about common water problems and how to tackle them in our Water Education Center.
Applies to select products purchased on pentair.com or pelicanwater.com

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