Whole-Home vs Under-Sink Filter

The Fundamental Coverage Difference

Whole-home filtration treats every drop of water entering your home: shower, laundry, kitchen, every bathroom tap, every toilet, the water heater, the dishwasher, the ice maker. Under-sink filtration treats only the water flowing through one fixture, usually the kitchen cold tap.

Your needs determine which (or both):

• Care about drinking and cooking water only: Under-sink is sufficient and cheap.
• Care about shower, laundry, and skin/hair: Whole-home is required.
• Care about appliance longevity (water heater, dishwasher): Whole-home is the only option.
• Care about everything: Both, with under-sink as the final polish at the kitchen.

What Each Contaminant Needs

Whole-Home Options for Tampa

Rheem Preferred Plus Whole-Home Filter

• Single-stage catalytic carbon cartridge in a housing.
• Handles chlorine, chloramine, sediment, mild iron.
• Does NOT reduce hardness. Pair with softener if hardness is a concern.
• $1,400-$1,800 installed. $49-$89 per cartridge, replaced every 12-18 months.
• Our recommendation for basic Tampa water quality improvement at reasonable cost.

Halo 5 Whole-Home

• 5-stage all-in-one tank: sediment, chlorine, chloramine, taste/odor, scale inhibition (ION descaler).
• Does NOT remove hardness minerals entirely (descaler reduces scale adhesion but water still “hard”).
• $2,400-$3,200 installed. Media is cleaned by backwashing, minimal replacement cost.
• Good for Tampa homes wanting “softer feel” without actual salt-based softener.

Halo 6 with UV

• All Halo 5 features + UV disinfection stage.
• Kills bacteria, viruses, cysts (Giardia, Cryptosporidium).
• $3,200-$4,200 installed. UV bulb replacement annually ($80-$150).
• Our recommendation for well-water homes in Lutz, Odessa, Plant City.

Under-Sink Options for Tampa

3-Stage Carbon Block Filter

• Sediment + carbon block + polishing carbon.
• Removes chlorine, chloramine (with catalytic), taste, odor, some sediment.
• Does NOT remove fluoride, lead, dissolved solids.
• $149-$299 unit, $299-$499 installed.
• 6-12 month filter life, $29-$79 per change.

4-Stage RO (Reverse Osmosis)

• Sediment + carbon + RO membrane + polishing carbon.
• Removes nearly all contaminants including fluoride, lead, dissolved solids.
• Dedicated faucet installed at the sink.
• $600-$900 installed.
• Pre-filters replaced every 6-12 months, membrane every 10-15 years.

5-Stage RO with UV

• Adds UV disinfection stage.
• $900-$1,400 installed.
• Best for well-water homes wanting drinking-quality protection.

Decision Framework for Tampa Households

Renting, budget under $300

Faucet-mount filter ($30-$60) or under-sink 3-stage ($149 DIY install). Basic chlorine and taste improvement.

Single-family home, want drinking water quality only

Under-sink 4-stage RO ($600-$900 installed). Dedicated faucet, FREE installation estimate.

Single-family home, want shower and laundry improvement too

Whole-home Halo 5 ($2,400-$3,200). Better skin, hair, laundry without RO.

Single-family home, want comprehensive protection

Whole-home Halo 5 + under-sink RO. Total $3,000-$4,100. Best-in-class for city water.

Well water home (Pasco, Lutz, Odessa)

Iron filter + whole-home Halo 6 + under-sink RO with UV. Total $5,000-$8,000. Address all well water contaminants.

Maintenance Comparison

Whole-home filters have tank-based media that backwashes itself (Halo 5/6). Cartridge-based whole-home (Rheem Preferred Plus) requires annual cartridge replacement. Under-sink filters require more frequent maintenance because the smaller media holds less capacity.

• Whole-home Halo: $0-$50/year (occasional media cleaning)
• Whole-home Rheem cartridge: $49-$89 every 12-18 months
• Under-sink 3-stage: $29-$79 every 6-12 months
• Under-sink RO: $80-$180 every 6-12 months (multiple stages)