Whole-House Water Filtration in San Diego, CA
San Diego water is hard and chlorine-treated, and many homes show it in the taste, odor, and scale. A&A Plumbing installs whole-house filters and under-sink reverse osmosis for cleaner water at every tap.
- Whole-House & Under-Sink Options
- Water Tested Before We Recommend
- Upfront, Written Pricing
Water Filtration Built for San Diego's Hard, Treated Water
San Diego's water is very hard, about 16 to 18 grains per gallon, and it arrives treated with chlorine or chloramine. That leaves sediment, scale, and a noticeable taste and odor at the tap. A water filter removes the contaminants behind those complaints and protects the fixtures and appliances that use water daily.
Whole-house filters install at the main line, at the point of entry, so every shower, sink, and appliance receives filtered water. Reverse osmosis works at the point of use, usually the kitchen sink, and delivers the purest drinking water in the house. The two are not competitors; they complement each other.
A&A Plumbing has served San Diego since 2020, sizing each system to your water. Older homes in North Park or Mission Hills may need updated fittings first, which we flag upfront.
Water Filtration Services in San Diego
From whole-house filters to under-sink reverse osmosis, we install systems matched to your water.
Whole-House Water Filtration
A point-of-entry filter at the main line that treats every tap and appliance.
Plumbing installation →Under-Sink Reverse Osmosis
Point-of-use RO at the kitchen sink for pure drinking and cooking water.
Kitchen plumbing →Sediment & Carbon Filtration
Single-stage, carbon block, and multi-stage filters that cut sediment, chlorine, and odor.
Water filtration →UV Purification
Ultraviolet treatment that neutralizes bacteria and microbes as water passes through.
Water filtration →Water Softener + Filtration Combo
A softener paired with a filter to handle both hardness and chemical or taste concerns.
Water softeners →Water Softener Installation
A system sized to your water and household, set up to reduce scale at the source.
Softener installation →Reverse Osmosis vs. Whole-House Water Filter
The two systems solve different problems. Reverse osmosis polishes drinking water at one tap, while a whole-house filter treats the water feeding every fixture.
| Feature | Under-Sink Reverse Osmosis | Whole-House Water Filter |
|---|---|---|
| Where it installs | Point of use at the kitchen sink | Point of entry at the main water line |
| Best for | Purest drinking and cooking water | Filtering every tap, fixture, and appliance |
| What it removes | Up to 97–99% of TDS, heavy metals, nitrates, fluoride | Sediment, chlorine, chloramine, taste, and odor |
| Typical cost | $400–$1,150 installed | $300–$2,000 by system type |
| Maintenance | Cartridges every 6–12 months, RO membrane every 2–5 years | Cartridges every 6–12 months |
Simple, Stress-Free Water Filtration Service
Here is what to expect when you call us for a filtration installation.
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1
Call or Request Service
Reach us at (619) 637-5215 or book online for same-day or emergency service.
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2
Test & Recommend
We review your water and home, then recommend the setup that fits your goals and budget.
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3
Install & Connect
We install the system at the main line or under the sink with clean, sealed fittings.
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4
Test & Maintain
We check for leaks, confirm flow, and set up a simple cartridge schedule.
Water Filtration Service Across San Diego County
Our licensed plumbers install filtration systems throughout the county. Find your neighborhood below.
Water Quality Tips & Plumbing Guides
Learn more about San Diego water and how it affects your plumbing.
Water Filtration Questions, Answered
Still have a question? Call us at (619) 637-5215 — we are happy to help.
How much does a whole-house water filter cost in San Diego?
Whole-house filtration runs about $300 to $650 for a single-stage sediment filter, $500 to $1,050 for carbon block, $800 to $2,000 for multi-stage, $650 to $1,250 for UV, and $2,000 to $4,500 for whole-house reverse osmosis, installed.
How much does under-sink reverse osmosis cost?
Under-sink reverse osmosis typically costs $400 to $1,150 installed. It removes up to 97 to 99 percent of TDS, heavy metals, nitrates, and fluoride, and needs no electricity in standard setups. Cartridges last 6 to 12 months and the RO membrane 2 to 5 years, about $80 to $200 a year.
Do I need both a water filter and a water softener?
Often, yes. A filter handles sediment, chlorine, chloramine, taste, and odor, while a water softener removes the hardness minerals that cause scale. Together they address both hardness and taste.
How long does water filtration installation take?
A whole-house water filter is usually installed in 2 to 4 hours, and an under-sink reverse osmosis system in 2 to 3 hours.
Will my older San Diego home need extra work?
Possibly. Older homes in North Park and Mission Hills may have dated shutoff valves or galvanized connections that need updated fittings first. We check the connection point and tell you upfront.
Ready for Cleaner Water in San Diego?
Call A&A Plumbing for licensed water filtration and reverse osmosis installation with upfront pricing.