Discount Plumbing San Francisco
Verified Pro
14+ years online5.0(475)
Water Treatment & Softeners in San Francisco, CA
Compare 39 water treatment & softeners contractors near you in San Francisco and surrounding area with an average rating of 4.6/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 28, 2026
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Other Businesses in This Area
Total Filtration Specialists
~24 years onlineFast Response Water Heaters
5.011½+ years onlineFlow Masters Plumbing, Drain and Water Heater
5.0~15 years onlineGeorge Salet Plumbing, Inc.
5.027+ years onlineHydroflow
5.0Pros Plumber San Francisco
5.0San Francisco Water Restoration Service
5.0South Bay Water Filters
5.0W2 Systems
5.0~25 years onlineAAA Water Systems
4.9~19 years onlineCabrillo Plumbing, Heating & Air
4.927½+ years onlineDiscount Plumbing Rooter Services
4.915 years onlineHeise's Plumbing
4.917½+ years onlineMagic Plumbing Heating & Cooling
4.929+ years onlineTap Score - Drinking Water Testing
4.910+ years onlineWB Plumbing Supply
4.9Aqua Spring
4.8Center Hardware & Supply Co., Inc.
4.821+ years onlineDry Kings
4.8~11 years onlineMr. Rooter Plumbing of San Francisco
4.830½+ years online24/7 Rooter & Plumbing
4.716+ years onlineAlbert Nahman Plumbing, Heating, and Cooling
4.723½+ years onlineAqua Forest Aquarium
4.6~22 years onlineCAL-STEAM
4.629 years onlineOcean Aquarium
4.6Works Plumbing Repair & Drain Cleaning
4.617½+ years onlinePACE Supply
4.329½+ years online6th Avenue Aquarium
4.1Magnation Water Technologies
4.0~14 years onlineGlacier Water Refill Station
3.921½+ years onlineSoma
1.315½+ years onlinePureSpring Water Softeners & Filters
1.03+ years onlineWater Treatment & Softeners in Nearby CA Cities
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Water Treatment & Softeners in San Francisco, CA
Water treatment and softener installation in San Francisco handles a specific Hetch Hetchy-source market: single-family Victorian and Edwardian homes, modern condos, apartment complexes, and commercial tenants. Typical jobs include carbon filtration for chlorine taste, reverse-osmosis drinking systems (popular with tech-demographic clients concerned about water quality), under-sink systems for kitchens, and occasional softeners (SF water is naturally soft so softeners rare). High-end demographics drive premium under-sink RO demand.
Whole-house softener installs in SF run $2,000-$4,500 (rare — SF water is soft); whole-house carbon filtration $1,800-$4,500; under-sink RO $500-$2,000; whole-house RO $8,000-$25,000. California requires a C-36 Plumbing Contractor license. SF DBI permits apply. Hetch Hetchy water runs 2-3 grain hardness — very soft. Softeners not typically needed. Carbon filtration popular for chlorine taste and disinfection byproduct removal.
Frequently Asked Questions
- Does SF water need softening?
- Almost never — Hetch Hetchy water is naturally very soft (2-3 grain). Softeners typically not necessary. Some older homes with lead or galvanized supply lines may benefit from specific treatment for those issues, but not standard softening.
- Should I install carbon filtration at my SF home?
- Worthwhile if you're sensitive to chlorine taste or concerned about disinfection byproducts. Whole-house carbon ($1,800-$4,500) treats all water entering your home. Under-sink kitchen-only ($300-$800) is cost-effective for drinking water only.
- Why are under-sink RO systems popular in SF?
- Tech-demographic clients value highest-quality drinking water. Under-sink RO ($500-$1,800) removes 95%+ of dissolved impurities. Filter replacement annual ($75-$200). Some premium systems add mineralization for taste after RO treatment.
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