Water Heaters Only, Inc
Verified Pro
15+ years online4.9(573)
Water Treatment & Softeners in San Jose, CA
Compare 26 water treatment & softeners contractors near you in San Jose 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 22, 2026
Most pros respond within 2–24 hours
Verified Pro Installers
Other Businesses in This Area
AQUA CRYSTAL WATER SYSTEM
6+ years onlineEunice Trade (Water filters/ RO system)
Pulse Water Treatment
13½+ years onlineServ-All Water Conditioning Repair and Installation Company.
23+ years onlineRandazzo's Water Conditioning
5.0Silicon Valley Advanced Water Purification Center
5.013+ years onlineThe Water Pros, Inc. | Water Filtration| Commercial Dishwashers| Water Purification|Water Softeners| Reverse Osmosis|
5.02+ years onlineDe Anza Water Conditioning, Inc
4.922½+ years onlineEvo Water Heating & Plumbing
4.97½+ years onlineSoft Patagonian - Water Softener and Filtration Systems
4.9~2 years onlineWater Heater Specialists
4.92+ years onlineLifeSource Water Systems - San Jose, CA
4.8~29 years onlineCropley Pure Water
4.7Dependable Water Heaters
4.7Always Pure Water
4.6Rubenstein Supply San Jose Wholesale
4.528½+ years onlineMountain Pure Water
4.3William Pure Water
4.3City Water Filter and Hyperbaric
4.216½+ years onlinePuretec Industrial Water
4.2~22 years onlineBest Purified Water
4.1Water Treatment & Softeners in Nearby CA Cities
Other Services in San Jose
Access Control & Intercom(40)Alarm System Installation(24)Appliance Installation(23)Artificial Turf Installation(20)Automotive Installs(6)Concrete & Paving(37)Deck & Patio Building(37)Electrical Services(26)EV Charger Installation(11)Fencing & Gate Installation(34)Fire Protection & Sprinklers(30)Garage Door Installation(23)
Water Treatment & Softeners in San Jose, CA
San Jose water treatment is needed because Santa Clara Valley Water District provides moderate hardness (5-9 grains/gallon) and seasonal taste/odor issues. Older Willow Glen homes may have lead service lines. Most homes benefit from a softener plus carbon filter combo plus point-of-use RO at the kitchen. NeedInstall connects you with SJ water treatment installers familiar with SCVWD reports, CA plumbing code, and lead-mitigation strategies.
SJ water treatment installs run $1,800-$6,500 for softener + carbon, $5,500-$13,000 for whole-home RO (premium market). CA requires a C-36 plumbing license. Standard salt-based softeners use 35-50 lbs salt/month.
Frequently Asked Questions
- Salt or salt-free?
- Salt-based for measurable softening.
- Whole-home RO?
- For premium homes with fine fixtures, yes.
- Maintenance?
- Salt 6-10 weeks, sediment 3-6 months, carbon 9-12 months.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across San Jose and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.