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Sentry H2O Water Test Kit
You can’t fix what you can’t measure — and most homeowners are guessing.
Free Ground shipping on every order, contiguous US. No minimum.
- Online checkout not available yet
- Plug & play
- Filters & filter media are consumables
- Mountain Pure Water support
Why it matters
The Water Test Kit, in short.
Stop guessing what's in your water. This lab-grade kit tells you exactly what you're drinking, so you buy the right system once — no over-spending, no under-protecting.
On a well, it's required before we build your Whole House System: well water is different at every address, and the test is how we get yours right and keep your warranty valid. Knowledge first, clean water next.
Go deeper
The complete breakdown
Everything about the Water Test Kit — what it targets, how it installs, maintenance and the honest limits.
The details
Specifications
Specifications reflect the manufacturer (Sentry H2O). See our Science page for published independent lab reports and testing gaps. We do not call the complete systems NSF certified: Sentry H2O uses tested or certified components where applicable.
Straight answers
Common questions
Is the Sentry H2O Water Test Kit right for my home?+
Anyone who wants to know exactly what’s in their water before they buy. Not sure? Our 60-second quiz confirms fit in a minute.
How do I handle a return, shipping damage or a warranty claim?+
Contact Mountain Pure Water first at (435) 990-3778 with your order number and details of the issue; include photos for shipping damage. We coordinate the review and issue any return instructions, including the correct destination. Wait for our instructions before sending anything back. Shipping damage, including broken fittings, is reviewed case by case. See our Shipping, Returns & Refunds policy for the 30-day return window, restocking fees and warranty terms.
Is shipping free?+
Free Ground shipping on every order, contiguous US. No minimum. Shipping is $10 to Alaska, Hawaii and Puerto Rico. We ship to US addresses only. See our Shipping, Returns & Refunds policy for details.
What is catalytic-carbon filtration, and how is it different from reverse osmosis?+
Catalytic-carbon filtration uses specially processed activated carbon that reacts with and breaks down contaminants as water passes through multiple stages. Unlike reverse osmosis, our Sentry H2O systems don't strip the water of everything -- they target the bad stuff while leaving naturally occurring beneficial minerals in place. The non-RO city filtration stages produce no RO reject-water waste.
Does the system need electricity or produce wastewater?+
Our non-RO city filtration stages run on water pressure and produce no RO reject-water waste. UV accessories require power. Well treatment may produce waste or backwash water; requirements depend on the selected configuration.
Real customers, real water
Review evidence for this product
Product relevance is stated explicitly; unrelated excerpts are never substituted.
Sentry H2O store review snapshot, independently collected by Judge.me, as of August 2026.
Sentry H2O store reviews
August 2026 review-count snapshot.
Rating, count and verification rate checked on Judge.me September 15, 2026.
See the Sentry H2O store reviews →
Know your water
Know what is in your water before you choose a system.
Start with independent findings for your area, then match your home to the right Sentry H2O system.
Read your local water report
Your area's annual Consumer Confidence Report (CCR) lists what has been detected in your municipal tap water.
Salt Lake City? See what's really in your water →Check the EWG Tap Water Database
Enter your zip code for a plain-language breakdown of the contaminants found in your local supply.
Open the EWG database →At-home test kit (for well water and specific concerns)
Use our mail-in well-water kit when an individual result makes sense for your source or concern.
Shop the well-water kit →Want help matching the result to a Sentry H2O system?