Clean water off the grid
Outdoors
When you leave home — or the grid does — clean water shouldn’t leave with it. The same Sentry H2O BioChemGuard media, built to travel: portable systems, bottles and emergency-ready filtration.
Who it’s for
Travel & RV
Carry clean, great-tasting water wherever you go, from camper hookups to lake weekends.
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Animal Health
Portable filtration for barns, troughs, events, and the water your animals depend on.
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Emergency Kits
A renewable clean-water layer for outages, stored-water plans, and uncertain sources.
Learn moreFollow local advisories in an emergency. Performance varies by source water. Animal-health guidance is general, not veterinary advice.
Systems & gear
Sentry H2O Portable System
Travel, off-grid living, RVs, equestrian and barn water supply, and emergency kits — anywhere you need filtration on demand.
Sentry H2O BioChem OTG Bottle
Anyone who wants clean water away from home — tap water, airports, hotels, gyms or the trail. Just fill and drink.
Real customers, real water
Loved by thousands of households
Verified reviews of Sentry H2O systems, independently collected by Judge.me.
Review of Whole House System
My whole house system
The whole house system was easy to hook up — had all the right parts to get it running in no time. I know I'll always have fresh, clean water, and it's nice not having water spots on the cars after washing them. What a great company with a great product.
Review of Sentry Shower Filter
Sentry shower filter
Easy installation, high quality, water is clear, no water smell and no more skin irritation. Just ordered a second one. Highly recommended!
Review of Sentry Shower Filter
Great Filter
I've been fighting hard-water discoloration on silver hair for a long time, and this filter worked wonders removing it. It also makes hair super soft and does wonders for the skin. Highly recommend!
Review of Whole House Wellness System
I love it!
I love it! One less thing to worry about in the house. I appreciate the company's help — everyone was so nice.
Review of BioChem OTG Bottle
Love the water bottle
I love the water system and shower filter — huge, huge difference. I bought the water bottle and love it too; I take it to restaurants and filter out the chemicals. Big thumbs up on the entire system.
Review of Whole House Wellness System
Whole house — positive review
The installation, setup and questions answered by Sentry's installer went seamlessly. We now have better-tasting water and no longer have water spots on our vehicles.
Review of Sentry Wellness System
Excellent filter system
We purchased the RV water filter and it is the key to better-tasting water. If you have well water, this is the solution you need.
Review of Sentry Shower Filter
Shower adapter & filter
Best thing I've bought in a long time — worth every penny and more. I've never felt so clean after a shower.
Reviews independently collected & verified by
Common questions
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. You get cleaner, better-tasting water without wasting a drop or plugging anything into the wall.
Does the system need electricity or produce wastewater?+
No electricity, no drain connection, and no wastewater. Reverse osmosis systems can reject 3 to 5 gallons for every gallon they make; our Sentry H2O systems reject none and run on normal household water pressure. That means no extra drain line, no outlet, and nothing to plug in.
Does it change the taste or smell of the water?+
Yes -- for the better. Chlorine and chloramine drive most of that tap-water taste and smell, and the ToxyGuard stage is built to reduce both. The AlkaGuard stage then adds back trace minerals for a cleaner, rounder flavor, without the flat aftertaste reverse osmosis can leave behind.
What about chlorine and chloramine from city water?+
Both are specifically targeted by the ToxyGuard stage in every Sentry H2O system. Chloramine is notoriously hard to remove with standard carbon, which is exactly why we use catalytic carbon -- its enhanced reactivity breaks chloramine down more effectively, so your water smells and tastes clean straight from the tap.