Water Filtration Systems in Stockton, CA
Stockton’s water supply is treated, but “safe” doesn’t exactly mean “clean-tasting.” Furthermore, “safe” doesn’t account for what happens to water inside an older home’s pipes before it reaches the tap. Knights Plumbing & Drain installs whole-home and point-of-use water filtration systems throughout Stockton and San Joaquin County, giving homeowners water that’s actually good.
Call (209) 319-0579 for a water filtration system installation.
What's in Stockton's Water
Stockton’s water comes from a combination of Delta surface water and groundwater sources. Treatment removes biological contaminants, but it introduces its own byproducts (chlorine and chloramine), which account for that chemical taste and smell many Stockton residents have just learned to tolerate. Older homes in neighborhoods like Miracle Mile, Lincoln Village, and Del Rio often have sediment, rust particles, and trace metals in tap water.
Point-of-use filters address what you drink and cook with, while whole-home systems address what comes into contact with everything: your fixtures, your appliances, and your skin in the shower.
Water Filtration Options We Install
- Whole-home filtration systems: Installed at the main water line entry point, whole-home systems treat every drop that enters your home. This protects fixtures, water-using appliances, and plumbing infrastructure from sediment and chlorine that accelerate wear over time.
- Under-sink filtration systems: Compact and targeted, under-sink systems treat water at the kitchen tap for drinking and cooking. Multi-stage systems can remove chlorine, sediment, heavy metals, and a wide range of dissolved contaminants.
- Reverse osmosis systems: The most thorough point-of-use option. Reverse osmosis removes chlorine, fluoride, nitrates, heavy metals, dissolved solids, and most biological contaminants. These units are common in Stockton homes where water taste and purity are a priority.
- Our Offers
Plumbing Coupons and Special Offers
We believe every customer deserves high-quality plumbing at a fair price. Take advantage of our current coupons to save instantly on essential services:
$15 OFF
ANY DRAIN CLEANING SERVICE
Coupon must be presented at the time of service and cannot be combined with other offers.
$15 OFF
ANY PLUMBING REPAIR SERVICE
Save on common repairs like leaks, clogs, or fixture replacements.
$15 OFF
ANY WATER HEATER (INSTALLED)
Upgrade to a new water heater and enjoy instant savings.
- plumbing service company
Main Services We Cover
- 5-Star Reviews
Over 3k Positive Reviews From Our Clients
EXCELLENT
Based on 542 reviews
Posted on Google![]()
E XTrustindex verifies that the original source of the review is Google.
We always request Joe to service our home because he is very professional and knowledgeable! He’s also quick and cleans after his service!Posted on Google![]()
Vikki FrazierTrustindex verifies that the original source of the review is Google.
As always (we live in an old house) Knights Plumbing are our go to plumbers. Always respectful and in good moods. Today it was Victor’s turn to tackle roots in the pipes. Fast, professional and overall a great guy. He was informative without being pushy about our pipe and tree situation (we do know it’s not great) 5/5 stars. Thanks VictorPosted on Google![]()
Diana GillisTrustindex verifies that the original source of the review is Google.
Victor was amazing. Very professional and personable. He explained everything so that I could understand. His workmanship is great and was done in a timely manner. I would trust him with all future work. Thanks Victor...you're the best and I love your friendly personality.Posted on Google![]()
B. J.Trustindex verifies that the original source of the review is Google.
Victor is an awesome plumber. He has excellent plumbing and customer service skills, and is very efficient and clean. He fixes any plumbing issues I ever had every time the first time. Highly recommend Victor to anyone who expects a professional plumber!Posted on Google![]()
Elena SanchezTrustindex verifies that the original source of the review is Google.
Our technician Victor did a fantastic job of running his cable and camera in our sewer line. He unclogged our blockage, fast and efficiently. He was very respectful. I would recommend this company to anyone who’s looking for plumbing services.. Leslie took our phone call and he got someone to us in less than an hour! It wasn’t expensive for the amount of work that was done .If I could give this company more stars, I would.Posted on Google![]()
Jose RanesesTrustindex verifies that the original source of the review is Google.
Victor was on time and knowledgeable tech and gave me alot of information about tankless water heatersPosted on Google![]()
Jake HaigTrustindex verifies that the original source of the review is Google.
Michael was the service technician that helped me out and he was very thorough and neat with his work. He made sure his work was done correctly and was very communicative with his process during installation and through their office. Would recommend again.Posted on Google![]()
J DTrustindex verifies that the original source of the review is Google.
Very pleased with the service. Technician Michael was just awesome. Well versed, polite and helpful. Definitely recommend to all!
Why Filtration Also Protects Your Plumbing
Chlorine in tap water isn’t just a taste issue. It degrades rubber seals, o-rings, and gaskets in faucets and valves over time. Sediment particles score the interior of fixtures and appliances. A whole-home filter reduces the long-term wear on everything your water touches, from your water heater to your dishwasher.
How We Work
Your Stockton plumber assesses your current water quality, identifies what you’re trying to address, and recommends the right system. You get a fixed price before installation begins. All filtration system installations are backed by the Knights Worry-Free Guarantee.
- Serving the Central Valley
Plumbing Services Near You
Affordable Plumbing for Everyone
Plumbing Specials & Coupons
Save instantly on everyday plumbing services.
Flexible Financing
Easy payment options so you don’t have to delay important repairs or upgrades.
Royalty Club Membership
Exclusive perks like discounts, inspections, annual water heater flushes for members.
- Our Process
Plumbing Rescue in 4 Easy Steps
Step 1
Call or Schedule Online
Contact us anytime to book service.
Step 2
Upfront Estimate
Get a clear, honest quote before work begins.
Step 3
Expert Service
Our plumbers get the job done right the first time.
Step 4
Guaranteed Results
If you’re not happy, you don’t pay.
- go to plumbing service company
Why Choose Knights Plumbing and Drain
- 30+ Years of Proven Experience: Serving Central Valley homes and businesses since 1995 with proven expertise.
- Trained, Certified & Drug-Free Technicians: Skilled professionals dedicated to safety and quality service.
- Fully Stocked Trucks: With 2,000+ parts on hand, most problems are fixed in a single visit.
- Upfront Pricing: No surprises: clear, honest quotes before work begins.
- Our Worry-Free Guarantee: If an issue arises after service, we return at no cost until it’s right.
- 3,000+ Great Reviews: Thousands of happy customers back our reputation for reliability.
- Our Work
Latest Projects
With more than 30 years of experience, we’re proud to be recognized as the best plumbing contractor for remodeling projects in the Central Valley. From kitchens and bathrooms to full commercial build-outs, we deliver expert plumbing, dependable service, and lasting results that bring your remodeling vision to life.

Nice Water Heater Swap Stockton, CA
Knights Plumbing and Drian responded to a service request regarding a water heater not producing hot water in Stockton, CA. Upon arrival, the Plumber met with the customer

50-Gallon Water Heater Replacement in Manteca, CA
The team at Knights Plumbing & Drain was recently called to a home in Manteca, where the customer was experiencing issues with their aging State

40-Gallon Rheem Water Heater Installation
Knights Plumbing and Drain responded to a service request in Modesto, CA, regarding a 40-gallon Water Heater that was not working correctly, leaving the customers with
- Contact Us
Schedule Your Stockton Water Filtration Installation
Call (209) 319-0579, schedule online, or text us. Knights Plumbing & Drain serves all of Stockton and San Joaquin County. To the Rescue Since 1995.
Knights Plumbing & Drain proudly serves these zip codes in Stockton, CA:
- 95201–95213
- 95215, 95219
- 95267, 95269
- 95296–95297
Operation Hours:
Sunday 8:30 AM-6 PM
Monday 7 AM-6:30 PM
Tuesday 7 AM-6:30 PM
Wednesday 7 AM-6:30 PM
Thursday 7 AM-6:30 PM
Friday 7 AM-6:30 PM
Saturday 7:30 AM-6 PM
Knights Plumbing & Drain Social Links