DUALGUARD™
Essential Wellness
2 Stages
ToxyGuard + AlkaGuard
Reduces common contaminants while adding essential minerals for better tasting water.
Shop DualGuard →Your tap water. Your family. Your responsibility.
Just because your water islegal doesn’t make it safe.
Meeting a legal standard isn’t the same as meeting your personal standard. Learn more about your tap water and how Sentry supports everyday wellness with contaminant reduction and mineral-enriched drinking water.
• Independently Tested
• Built in the USA
• Mineral-Enriching
• Zero-Waste Filtration
CLEAR WATER DOESN'T ALWAYS TELL THE WHOLE STORY
PFASCHLORINELEADARSENICVOCs
Some contaminants cannot be seen, smelled or tasted. Knowing what's in your water is the first step toward choosing the right treatment.
What could be in my water? →UPGRADE YOUR DRINKING WATER
WITH SENTRY H2O
TRIGUARD™
Advanced Wellness
3 Stages
ToxyGuard + AlkaGuard + BioChemGuard
Our most advanced system. Adds targeted treatment for hard-to-remove contaminants.
Shop TriGuard →WELLNESS STARTS WITH WATER
Choose a system that supports the water you drink, the way you live and the home you care for.
Know your water
Start with what is in your glass
A better water decision starts with context. Use your report, your routine and your priorities to understand what treatment makes sense for your home.
01
Find your report
Start with your local water-quality report or ask a specialist what to look for in your area.
02
Understand the details
Translate the technical language into the contaminants, minerals and taste factors that matter to your household.
03
Choose with confidence
Match your water source, routine and wellness priorities to the Sentry system that fits your home.
Independent testing / lab report
The numbers are worth reading
Water treatment should be measured, not assumed. Here is one example from Sentry's independent testing.
Contaminant tested
Total THMs
Untreated60.4PPB
→TreatedNot detectedPPB
Read the report
See what was tested, how it was tested, and what changed.Explore Our Lab Results →
Whole-home wellness — One visual system
Your home runs
on water
Treat the water you shower in, cook with, wash with and use throughout your home before it reaches the faucet.
System at a glance
One system. Water for the whole home
The system filters water as it enters your home before it reaches showers, sinks, laundry, cooking, and appliances. It is a whole-home approach to making everyday water choices more intentional.
Before the faucetOne point of entry for the whole home.
Made for your sourceChoose city water or start with your well profile.
Whole-home system
Designed to sit before the faucet.City-supplied water
The city-water system is designed for homes on a municipal water supply. Its package includes an under-sink system for mineral-enriched drinking water and whole-home revitalizer maintenance kits.
Well-water homes
The well-water system is custom to your household's well-water profile. A water-quality test is required before purchase so the system can be selected thoughtfully.
Keep your system in rhythm
Replacement filters and whole-home care
Keep the systems that support your daily water routine working with the right replacement filter or maintenance product.
Start here2-filter set
DualGuard replacement filters
ToxyGuard + AlkaGuardThe annual replacement set for Sentry DualGuard systems. Choose the water-source option that matches your system.
Quick buy now 🛒Well water set →
For your shower
Sentry Shower Filter
A cleaner-feeling shower, made simple.Designed to help reduce common contaminants in shower water with easy installation and long-lasting performance.
Shop shower filter
Whole-house care
Whole Home Revitalizer
Refresh the media in your whole-home system.Pour in the revitalizer, flush the system, and keep your whole-home filtration media working as intended. Sentry recommends use every 1–3 years depending on household size and water usage.
Buy revitalizer↻ Looking for another Sentry replacement set? Browse all replacement filters.
THE DIFFERENCE BETTER WATER MAKES
"The difference in our water quality is night and day. The installation was straightforward, and the peace of mind knowing our family is drinking clean water is invaluable."Sarah M.VERIFIED CUSTOMER · TRIGUARD UNDER-SINK SYSTEM
"As a licensed plumber for over 15 years, I've seen countless water systems. Sentry's build quality and filtration technology are among the best I've encountered. I installed it in my own home."David R.VERIFIED CUSTOMER · WHOLE HOUSE SYSTEM
"We used to buy bottled water every week. Since installing the DualGuard, our tap water tastes better than bottled. It's a fantastic investment."Michael T.VERIFIED CUSTOMER · DUALGUARD UNDER-SINK SYSTEM
FROM YOUR FIRST GLASS
TO YOUR LAST SHOWER.
Water touches nearly every part of your day. Sentry helps you upgrade what flows through it.
WATER ISN'T
ONE-SIZE-FITS-ALL
Not sure which Sentry system fits your home, water source or concerns? We'll help you narrow it down.
WHAT'S HAPPENING IN AMERICA'S WATER
UNDERSTANDING PFAS
CITY WATER VS. WELL WATERJOIN THE SENTRY H2O COMMUNITY
Water education, wellness, new products and stories worth knowing.
Join for special offers.
Trusted Partners & Certifications
