Water Softener Installation in San Diego, CA
San Diego water runs 16 to 18 grains per gallon, among the hardest in California. A&A Plumbing tests, sizes, permits, and installs a softener that stops scale at the source.
- Licensed & Permitted Work
- Sized From a Measured Test
- Upfront, Written Pricing
Hard Water in San Diego
San Diego water runs 16 to 18 grains per gallon, which is very hard. That calcium and magnesium leaves crust on faucets, film on glass, and scale inside water heaters, pipes, and appliances.
A salt-based ion-exchange softener removes hardness at the source, trading calcium and magnesium for sodium so softened water leaves the tank ready for your heater, laundry, and taps. Salt-free conditioners only change how minerals behave so scale sticks less; they do not remove hardness, so the water still tests hard. We install both.
Water Softener Installation Services in San Diego
We handle sizing, permits, and installation.
Ion-Exchange Softener Installation
Salt-based systems that remove calcium and magnesium, sized to your household.
Water softeners →Salt-Free Conditioner Installation
TAC conditioners that reduce scale sticking without adding sodium to your water.
Water softeners →System Sizing & Hardness Testing
On-site hardness testing and a grain-capacity calculation based on real household water use.
Water filtration →Drain Line & Bypass Setup
A code-compliant drain with an air gap plus a brass three-valve bypass.
Plumbing installation →Water Softener + RO Combo
Pair softened water with reverse osmosis at the kitchen sink for clean drinking water.
Water filtration →Water Softener Repair & Replacement
Salt bridges, stuck valves, leaking tanks, and aging units repaired or swapped.
Water softener repair →What Size Water Softener Does Your Home Need?
Sizing starts with a measured hardness number and daily water use: 75 gallons per person per day, times hardness in grains per gallon, times seven days. Exclude irrigation and outdoor hose bibs. The table shows capacity at 17 grains per gallon.
| Household Size | Daily Demand | Recommended Capacity |
|---|---|---|
| 1–2 people | ~150 gal/day | 24,000–32,000 grains |
| 3 people | ~225 gal/day | 32,000 grains |
| 4 people | ~300 gal/day | 32,000–48,000 grains |
| 5 people | ~375 gal/day | 48,000 grains |
| 6+ people | ~450+ gal/day | 48,000–64,000 grains |
A Clean, Permitted Installation Process
Here is what to expect, start to finish.
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1
Hardness Test & Sizing
We measure your water's hardness, ask about household size, and calculate capacity.
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2
Permits & Placement
We pull the Simple No-Plan permit and pick a spot in the garage or utility room near power and drain.
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3
Installation & Bypass
We cut the unit into the main line ahead of the heater, add a brass three-valve bypass, and run the drain with an air gap.
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4
Test & Walkthrough
We verify hardness at the tap, set the regeneration schedule, and show you how to add salt.
Water Softener Installation Across San Diego County
Our licensed plumbers install and service softeners countywide.
Water Softener Tips & Plumbing Guides
Learn how hard water affects your plumbing.
Water Softener Questions, Answered
Still have a question? Call (619) 637-5215.
How much does water softener installation cost in San Diego?
Installed in 2026, a 32,000-grain salt-based system runs $2,400 to $3,400, a metered 48,000-grain unit $3,200 to $4,500, a dual-tank 64,000-grain system $4,500 to $6,800, and salt-free TAC $2,800 to $4,200. Salt adds $90 to $220 a year.
How do I know what size water softener I need?
Multiply household members by 75 gallons per day, then by hardness in grains per gallon, then by seven days. A four-person home at 13 to 17 gpg needs about 32,000 to 48,000 grains. Size from a measured reading and leave irrigation out.
Do I need a permit for a water softener in San Diego?
Yes. The City of San Diego lists softener installs under the Simple No-Plan Plumbing/Gas Permit, about $80 to $180. We pull the permit and handle inspection.
What is the difference between a water softener and a salt-free conditioner?
An ion-exchange softener removes calcium and magnesium, so the water actually tests soft. A salt-free TAC conditioner only reduces how scale sticks; it does not remove hardness minerals, so the water still tests hard. Choose based on whether you want truly soft water or just less visible scale.
How long does installation take and can the unit go outside?
Most installs take two to four hours. The unit needs an outlet within six feet and a drain with an air gap. We place it in the garage or utility room and keep outdoor hose bibs on the unsoftened bypass.
Ready for Softer Water in San Diego?
Call A&A Plumbing for water softener sizing, permits, and installation.