Clean, great-tasting water for every tap in your home. Whole-home systems, under-sink filters, and reverse osmosis installed right by the veteran-owned team San Antonio trusts.
The Problem
San Antonio draws from the Edwards Aquifer a high-mineral source that passes through conventional treatment before it reaches your tap. That treatment does its job, but it leaves behind chlorine, disinfection byproducts, and dissolved solids that affect how your water tastes, smells, and behaves.
Add aging infrastructure into the equation and you can also get sediment and particles that slip through. The result: water that meets code, but isn't doing your appliances, plumbing, or family any favors.
A properly matched filtration system tackles the specific issues in your home's water not a generic solution, but the right one for your supply.
Chlorine & Byproducts
Treatment chemicals affecting taste and odor
Sediment & Particles
From aging infrastructure and distribution lines
Hard Minerals
Calcium & magnesium that damage appliances
Heavy Metals & Pesticides
Trace contaminants from surrounding land use
“Clean, great-tasting water is essential for your family's health and your home's plumbing.”
The O5 Plumbing Standard
Our Solutions
Not every home needs the same solution. We assess your water quality, your household's usage, and your priorities then recommend the system that actually fits, not the most expensive one on the shelf.
Point-of-Entry System
Installed where the water supply enters your home, this system treats every tap, shower, appliance, and fixture under your roof. It's the most comprehensive approach to water quality one filter protecting the entire house.
Point-of-Use System
Compact and cost-effective, an under-sink filter targets your drinking and cooking water specifically. It connects directly to your cold water line and delivers filtered water through your existing faucet no dedicated tap needed.
Advanced Purification
The gold standard of home water filtration. RO pushes water through a semipermeable membrane, removing up to 99% of dissolved contaminants including heavy metals, bacteria, nitrates, and dissolved minerals that carbon filters can't touch.
Why It Matters
Fewer chlorine byproducts, fewer heavy metals, fewer dissolved solids making it into your glasses, cooking pots, and coffee mugs. A filtration system isn't a luxury it's a long-term investment in what your family drinks every day.
Chlorine is the biggest culprit behind bad-tasting tap water. Remove it and the minerals that cloud clarity and you'll notice the difference in your morning coffee, your ice cubes, and anything you cook with water.
Sediment and mineral deposits are the #1 cause of premature water heater, dishwasher, and washing machine failures. Filtration keeps those deposits from building up meaning fewer repair calls and longer-lasting equipment.
When your tap water tastes great, you stop buying bottled water. Many households spend heavily on bottled water each year. A filtration system pays for itself quickly and produces better water than most brands deliver in plastic.
Why O5
The filtration systems we install come from professional plumbing supply lines not the consumer shelf at a hardware store. The housings are thicker, the media lasts longer, and the manufacturer warranties are backed by companies that will still be in business when you need service.
We also don't mark up parts and hide it in the labor rate. You get a flat quote, you see what's in it, and you decide. If you want to think it over, we pack up with no pressure.
Request a ConsultationThe same discipline and accountability we held in service goes into every installation.
We know San Antonio's water. We size systems for your specific supply not the national average.
Commercial-supply systems with longer-lasting media and warranties that actually hold.
Consultation, installation, filter replacement, and maintenance we handle all of it.
Current Offers
Available
Active duty, reservists, veterans, and military families. Thank you for your service.
Claim OfferAvailable
For senior citizens on any water filtration installation or service. Restrictions apply.
Claim OfferConsultation Available
We assess your water, explain your options, and give you a flat quote no obligation.
Schedule NowCannot combine offers. One-time use. Subject to availability. Non-transferable.
Customer Reviews
"Had O5 install a whole-home filtration system last spring. The difference in our water quality was noticeable within the first week no more chlorine smell in the shower, coffee tastes completely different. Worth every penny."
Diana M.
Stone Oak • Whole-Home Filtration
"Eric and his team explained exactly what was in our water before recommending anything. No upsell. They matched us with an under-sink system that fit our budget and it's been working perfectly for a year. Flat-rate pricing, showed up on time, left everything clean."
Tony R.
Alamo Heights • Under-Sink Filter
"They came out, tested our water, and walked me through three options at three different price points. No pressure to go with the most expensive one. We went mid-tier and it's been great. I appreciated the honesty rare with any contractor."
Karen L.
Cibolo • Water Filtration Consult & Install
Common Questions
Ready to Start
We'll assess your water, walk you through your options, and give you a flat quote no surprises, no pressure. Same-day service available.
Mon-Fri 7:30 AM - 6:00 PM • Sat 8:00 AM - 5:00 PM • Same-day service when available
