Reverse Osmosis Systems
Crisp, clean drinking water straight from the tap.
Free in-home estimates on replacements.
How reverse osmosis improves drinking water
A reverse osmosis system uses a semipermeable membrane to reduce many dissolved solids. Carbon filtration stages address chlorine taste and odor. The combined system treats water before the water reaches your glass. Most residential systems are installed under the kitchen sink, with a dedicated faucet that delivers filtered water separately from the regular tap, though some households also connect a line to the refrigerator for filtered water and ice.

These systems typically use multiple filtration stages in sequence, including a sediment prefilter, a carbon filter, the reverse osmosis membrane itself, and sometimes a final polishing filter. Each stage addresses a different type of impurity, and the combination is why reverse osmosis water tends to taste noticeably different from unfiltered tap water.
Installation and what to expect
Installing a point of use reverse osmosis system involves connecting to the cold water supply line under the sink, running a drain line for the system's wastewater, and installing the dedicated faucet, which usually requires a small hole in the countertop or sink if one is not already present. The technician will walk through where the faucet will be placed before drilling anything, so placement is agreed on ahead of time.
Water quality testing before installation helps confirm which filtration stages are appropriate for your specific water, since every household's incoming water is slightly different. After installation, the system is tested to confirm proper flow and filtration before the technician leaves.
Maintenance, warranty, and getting started
Reverse osmosis filters need periodic replacement to keep performing correctly, since a worn out filter stops removing contaminants effectively even though water still flows through it. The replacement schedule depends on usage and your specific system, and the technician can explain what to expect for your household when the system is installed.
Installation workmanship is backed by a satisfaction guarantee, and the equipment itself carries the manufacturer's warranty for defects. Keep your invoice along with the model and serial number for the unit installed. Financing is available through home-service lenders, including 0% promotional plans for qualifying, approved credit, with quick applications and fast lender decisions in most cases.
Iron Horse is family owned and based at 1917 E 5th St in Tempe. Call (480) 808-9990 to ask about reverse osmosis options for your kitchen or to schedule an installation.
Our process
- 1
Test your water
We test your water at your home and go over the results with you.
- 2
Pick the spot
We choose the system and where it goes under the sink, and plan a line to your fridge if you want one.
- 3
Install
We install the system and the faucet and check for leaks.
- 4
Show you the upkeep
We walk you through filter changes and register the warranty for you.
What Our Customers Say
Leave Us a Google Review★★★★★
"Christie was personable and knowledgeable, and Ryan's diagnostics were thorough, clean, and clearly explained. Reliable, professional, fair pricing. We'd rate Iron Horse a 10+."
★★★★★
"The Iron Horse maintenance program is fantastic. Jonathan's inspections are detailed and he takes the time to explain everything so we understand our system and what it needs long-term."
★★★★★
"Jorge responded to our plumbing emergency within hours, assessed it thoroughly, and explained every step with a sense of humor. Iron Horse will absolutely be our first call next time."
Frequently asked questions
Does reverse osmosis remove everything from tap water?
It removes a wide range of dissolved solids and contaminants, and the specific results depend on your incoming water quality, which testing can confirm before installation.
How often do reverse osmosis filters need replacing?
Replacement frequency depends on household usage and the specific system installed, and the technician can outline an expected schedule at installation.
Can I connect the system to my refrigerator?
Yes, a line can typically be run to the refrigerator for filtered water and ice, in addition to the dedicated kitchen faucet.
Will installation require cutting into my countertop?
Most installations need a small hole for the dedicated faucet if one is not already present, and placement is agreed on with you before any drilling happens.
We Service Every Make and Model
Iron Horse is locally owned and services every make and model of AC, heat pump, furnace, water heater and plumbing fixture. If you got a quote for a specific brand, we can work on it.
Authorized Dealer
- Carrier
- Goodman
- A/C Pro
- Ruud
We also service
- Trane
- Lennox
- Rheem
- American Standard
- Bryant
- Daikin
- York
- Amana
- A.O. Smith
- Bradford White
- Rinnai
- Navien
Fast, Fair, Always There
Need reverse osmosis systems?
Talk to a licensed technician today. Estimates on replacements are free. Repair visits start with a $120 diagnostic, and we waive it when you go ahead with the repair. 24/7 emergency service.


