Whole-House Filters
Updated February 24, 2026
Point-of-entry systems that filter all water entering the home. Remove sediment, chlorine, and common contaminants from every tap. Typical price range: $300 – $1500. Best for: Whole-home water quality improvement.
Overview
Whole-house water filters treat all water entering your home -- every faucet, shower, appliance, and hose bib gets filtered water. They install on the main water line and remove sediment, chlorine, chemicals, and sometimes specific contaminants like iron or manganese. Different from point-of-use filters (which treat water at a single faucet), whole-house systems protect your entire plumbing system, appliances, and fixtures from the damaging effects of unfiltered water. Multiple filter types can be combined for comprehensive treatment.
How to Choose Whole-House Filters
Whole-House Filters are best suited for whole-home water quality improvement. They typically cost $300 – $1500, so plan your budget accordingly. Sizing is important — size by flow rate and filter capacity. the system must handle peak household flow (typically 10-15 gpm for a 3-4 bedroom... Key advantages include filters all water and reduces chlorine.
Pros & Cons
- Filters all water
- Reduces chlorine
- Protects appliances
- Low maintenance
- Upfront cost
- May reduce water pressure
- Filter replacement costs
Key Features
- Filters all water entering the home -- every fixture gets treated water
- Removes sediment, chlorine, chloramine, and chemical contaminants
- Protects pipes, water heater, and appliances from sediment and chemical damage
- Available as single-cartridge, multi-stage, and media tank systems
- Flow rates from 10-25+ GPM to handle whole-house demand without pressure drop
Top Brands for Whole-House Filters
Sizing & Selection
Size by flow rate and filter capacity. The system must handle peak household flow (typically 10-15 GPM for a 3-4 bedroom home) without significant pressure drop. Larger cartridges (4.5x20 inch big blue) or media tanks provide higher flow rates and longer filter life than standard 2.5x10 inch cartridges. Calculate filter life based on your water quality and usage to determine replacement frequency.
Installation
Install on the main water line after the meter/well tank and before the water heater. A bypass valve is essential for filter changes without shutting off the house water. Pre-filter (sediment) before carbon filter is the standard two-stage setup. Media tank systems (catalytic carbon, KDF, or multi-media) install similarly but are larger and may require a drain connection for backwashing.
Maintenance
- Replace sediment pre-filter cartridges every 3-6 months depending on water quality.
- Replace carbon filter cartridges every 6-12 months or per manufacturer recommendation.
- Media tank systems backwash automatically on a schedule -- check the timer and drain line annually.
- Monitor water pressure before and after the filter. A significant pressure drop means the filter is clogged and needs replacement.
- Test your water annually to verify the filter is performing as expected.
Buying Tips
- Big Blue cartridge systems (4.5x20) are the most popular and versatile. Brands: Pentek, Culligan, iSpring.
- Two-stage setup (sediment + carbon) covers the most common residential needs: -400 for the housing, -60/year in replacement filters.
- Media tank systems (-2000) are better for high-volume or problem water (iron, manganese, sulfur) because the media backwashes and lasts 5-10 years.
- If you are on city water, carbon filtration removes chlorine and improves taste throughout the house. You will notice the difference in showers and cooking.
- Well water: test first, then select filtration specific to your contaminants. A generic carbon filter may not address iron, sulfur, or bacterial issues.
Frequently Asked Questions
What are the advantages of whole-house filters?
Filters all water Reduces chlorine Protects appliances Low maintenance
What are the disadvantages of whole-house filters?
Upfront cost May reduce water pressure Filter replacement costs
Who should buy whole-house filters?
Whole-House Filters are best for: Whole-home water quality improvement.
How are whole-house filters installed?
Install on the main water line after the meter/well tank and before the water heater. A bypass valve is essential for filter changes without shutting off the house water. Pre-filter (sediment) before carbon filter is the standard two-stage setup. Media tank systems (catalytic carbon, KDF, or multi-media) install similarly but are larger and may require a drain connection for backwashing.
How do I choose the right size for whole-house filters?
Size by flow rate and filter capacity. The system must handle peak household flow (typically 10-15 GPM for a 3-4 bedroom home) without significant pressure drop. Larger cartridges (4.5x20 inch big blue) or media tanks provide higher flow rates and longer filter life than standard 2.5x10 inch cartridges. Calculate filter life based on your water quality and usage to determine replacement frequency.
What are the best brands for whole-house filters?
Top brands for whole-house filters include 3M, AO Smith, APEC Water, Aqua-Star. Each offers different price tiers and product lines.
How do I maintain whole-house filters?
Key maintenance tips: Replace sediment pre-filter cartridges every 3-6 months depending on water quality.. Replace carbon filter cartridges every 6-12 months or per manufacturer recommendation.. Media tank systems backwash automatically on a schedule -- check the timer and drain line annually..