
Pentair Whole House On Demand Carbon Filtration System (4+Bath) 35925
Whole House On Demand Carbon Filtration System (4+ Bath)
- Carbon filtration can reduce chlorine
- Three unique models to choose from to meet the demands of your home based on your home size (number of bathrooms)
OVERVIEW
BENEFITS OF A CARBON WATER FILTER SYSTEM
Chlorine is commonly used chemicals in municipal drinking water treatment disinfection to kill microbes like bacteria, viruses, protozoa, and endospores. Chlorine can leave behind its recognizable foul taste and odor in your drinking water. Or you might also experience dry, itchy skin when you get out of the shower. With a Pentair Whole House On-Demand Carbon Water Filter System, you can receive high performing and long-lasting filter media for peace of mind, with every turn of the tap. This whole home water filter can transform your chlorinated incoming water into chug-worthy, worry-free water without the telltale odor and taste of chlorine.
- Coconut shell-based carbon for highly effective chlorine reduction and long filter life
- Automatic bypass for uninterrupted water flow to the home during reactivation
- Singular, rotary disc seal means less maintenance
- Simple electronic system for easy programming
- Maintains settings during power outages

Reduce Chlorine Taste and Odors

Enjoy Softer Skin and Shinier Hair

Better Water With Fewer Byproducts

Enjoy Peace of Mind
HOW IT WORKS
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.
Backwashing
Periodically the system will go through a backwashing cycle where water is flushed through the system and up through the media, then discharged to the drain. Backwashing lengthens the life of the media and maintains the performance of the filter.
Controller
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.
RESOURCES
DOWNLOADS
- PENTAIR ON-DEMAND CARBON FILTER SPEC SHEET (4005645)
- PENTAIR WHOLE HOUSE CARBON FILTRATION SYSTEM MANUAL
CERTIFICATIONS

Systems tested and certified by WQA under NSF/ANSI/CAN Standard 61 for material safety and NSF/ANSI 372 for lead free compliance only.
WARRANTY
https://modernhomessupply.com/pages/pentair-warranty
FREQUENTLY ASKED QUESTIONS
Can I install the Whole House Carbon Filtration System outside?
We recommend the water filter and control valve not be exposed to outdoor elements like direct sunlight or atmospheric precipitation. We offer an outdoor weather cover accessory that will help protect the valve head from elements. This system can also be installed in a covered, open-air structure like a carport or basement.
What is the difference between the three models?
Each model has a different volume of carbon media to best suit your household water usage and needs. The three models contain 1.0, 1.5, and 2.0 cubic feet of carbon media, respectively.
Does this system reduce microorganisms?
No. If you are concerned about microbial contaminants like viruses and bacteria, we recommend installing a Pentair UV Disinfection System.
SPECIFICATIONS
ITEM # | IMAGE | MEDIA VOLUME {FT³} | FLOW RATE {GPM} | DIAMETER {IN} | HOME SIZE (NUMBER OF BATHROOMS) | EST. FILTER LIFE | WATER PROBLEM |
---|---|---|---|---|---|---|---|
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1
|
11.6
|
10.25
|
1 to 2
|
Municipal Water - 60 months Well Water - 12 months
|
Chlorine Taste & Smell
|
|
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1.5
|
11.9
|
10.25
|
3 to 4
|
Municipal Water - 60 monthsWell Water - 12 months
|
Chlorine Taste & Smell
|
|
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2
|
13.2
|
12
|
4 to 6
|
Municipal Water - 60 months Well Water - 12 months
|
Chlorine Taste & Smell
|
WHAT’S INCLUDED
- Filtration Tank with Carbon Media System
- Electronic Valve Control
- Owner’s Manual / Installation Guide
INSTALLATION INFORMATION
Installation Recommendation: DIY+ or 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.