At Guthrie & Frey Water Conditioning, we install and service high-quality reverse osmosis water filter systems that deliver clean, refreshing water straight from your tap. Whether your home uses municipal or well water, our advanced reverse osmosis (RO) systems remove impurities and improve taste.
We aim to give your family peace of mind regarding your water supply. To learn more about what an RO system installation can do for you, contact us today!
If you’re interested in a whole-home drinking water system, reach out to our experts. Since 1974, our family-run company has been helping Wisconsin residents enjoy high-quality water. Whether you rely on a well or a municipal system, we can install the ideal treatment system for your needs.
Nitrates – 80%
Lead – 98%
Arsenic (pentavalent) – 98%
Cysts (Crypto/Giardia) – 99.99%
Fluoride – 95%
Radium – 80%
Total Dissolved Solids (TDS) – 93%
Our certified technicians handle every step of your RO filter system installation with precision and care. We start with a water test to identify what is in your water supply. Then, we’ll install your new system neatly under your kitchen sink, in a basement, or in another convenient location. After setup, we’ll test your water quality again to ensure your system performs at peak efficiency from day one.
Proper RO system maintenance ensures long-lasting performance. Guthrie & Frey makes it easy with flexible service options and replacement filters shipped right to your home.
Need a reverse osmosis water filter replacement? Order filters online, or schedule an appointment for regular maintenance with our technicians. We also offer fast, reliable reverse osmosis system repairs, so you never have to wait on clean water.
Check Out the Unique Benefits of Our Reverse Osmosis Systems
Request information fast from one of our water conditioning specialists to help you find the right water softener for you.
"*" indicates required fields
A: Tap water can contain minerals, chemicals, and other impurities that affect taste and quality. A reverse osmosis filter system removes these unwanted elements, producing clean, crisp water that’s perfect for drinking and cooking.
A: Reverse osmosis systems solve many common water issues for Wisconsin homeowners, including:
With an RO system, you can enjoy clean drinking water for you, your family, and your pets.
For more than 50 years, Guthrie & Frey has been a trusted name in water treatment throughout Southeastern Wisconsin. From RO system installations to ongoing maintenance and RO system repair, our experienced team helps keep your drinking water clean and fresh.
We also offer:
Contact our water treatment experts today— we’re always happy to help you find the best solution!
And Mequon WI – Cedarburg WI – greater Milwaukee area
Schedule automatic salt delivery, hassle-free. Guthrie & Frey will place the salt right into your brine tank on your scheduled day, perform a visual inspection of your equipment, and haul the empty bags away.
Guthrie & Frey has been installing water conditioning and filtration systems throughout the greater Southeastern Wisconsin area since 1974. Check out what counties we serve.
Looking for a product brochure, manual, or have questions about your water filtration system? Our resource center may contain what you’re looking for.
