Drinking Water Systems
Reverse osmosis drinking water systems
A whole-home system is not designed to make drinking water. Reverse osmosis is — it pushes water through a membrane fine enough to strip out dissolved solids, heavy metals like lead, and the remaining chlorine. This is the water you drink, cook with and fill the coffee machine from.
Best sellerHW800 AlkaPro Tankless RO
800 gallons a day, 7 stages, no bulky tank under your sink.
Tankless reverse osmosis that filters down to 0.0001 microns — fine enough to take out lead and other heavy metals, dissolved solids, chlorine and common contaminants. Because it's tankless, you get water on demand and your under-sink cabinet back.
Best for: Anyone who wants better drinking and cooking water
Details and specs
5-Stage Tank Reverse Osmosis
The classic under-sink RO. Proven, simple, affordable.
A traditional reverse osmosis system with a storage tank. Five stages of filtration, a dedicated drinking-water faucet, and decades of track record behind the design. If you want clean drinking water without the tankless price, this is it.
Best for: Households wanting proven RO at a lower price
Details and specsWorth knowing
Why this matters
It filters to 0.0001 microns
Fine enough to catch lead and other heavy metals, dissolved solids and contaminants that a carbon filter alone will pass straight through.
Your coffee and ice change noticeably
The taste difference in coffee, tea and ice is the thing customers mention most. Cooking too — pasta water and stock genuinely taste different.
It replaces bottled water
A household getting through cases of bottled water a month usually finds an RO system pays for itself faster than they expected, and stops the plastic.
Real reviews
What customers actually say
Every review below is a verified Google review — not a testimonial we wrote.
“Best plumber in OKC! Call Kalob and he will take care of anything! Way better prices than all the big wigs!”
Free water test
Find out what's actually in your water
We'll test your water at your kitchen sink, show you the result, and tell you what — if anything — you need. Free, and there's no system that fits every house.
- Free on-site water test
- $2,699 installed, city water or well
- 24-hour emergency plumbing