GUARD-S1 Emergency Water Filter Straw
GUARD-S1 Emergency Water Filter Straw
The GUARD-S1 uses a power-free, lab-tested, 4-stage micro-filtration system to turn rivers, lakes, and rainwater into safe drinking water for your family instantly.
Works when the power grid fails
Removes 99.99% of contaminants
Never expires, backed for life
Provides up to 1,500 gallons of clean water
Scientifically developed & lab-tested
Ultra-light & portable
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GUARD-S1 Emergency Water Filter Straw
Product Description
Product Description
The One Thing Standing Between Your Family and Survival
You can last three weeks without food. Without clean water, you have about three days.
When disaster hits — a hurricane, a grid failure, a contaminated municipal supply — bottled water vanishes from shelves within hours. Stores empty. People fight over the last case. While everyone else is scrambling, the question is simple: what's your plan?
When Everything Else Fails, This Works
The GUARD-S1 turns almost any freshwater source — streams, ponds, lakes, even collected rainwater — into clean, drinkable water. No power. No batteries. No chemicals. [Hang it and let gravity do the work. / Sip straight from the source or screw it onto a bottle.]
While other families ration their last few bottles, you'll have a steady supply of safe water on demand.
Filtration Built for the Worst Case
Our 0.1-micron hollow-fiber membrane removes:
- 99.99% of waterborne bacteria
- 99.99% of parasites & protozoa
- 99.99% of microplastics
This isn't a camping gadget. It's hollow-fiber filtration in the same class relied on by emergency responders and the outdoor survival community.
Small Enough to Forget, There When It Counts
The GUARD-S1 packs down small enough to live in your bug-out bag year-round — no shelf life, no expiration date, and up to 400 gallons of clean water over its lifespan. Drop one in your emergency kit, your glovebox, every go-bag in the house.
Because the worst time to find out you're unprepared is when the crisis is already here.
Don't wait until it's too late. The time to prepare is now — while you still can.
Shipping Details
Shipping Details
Here is how our shipping process works.
- Processing Time:Â 1-3 days
- Cost: 100% FREE! Once shipped, you will receive a tracking number for your order so you know where it is at all times.
- Estimated Delivery:Â Most orders arrive 5-7 business days after being handed off to the carrier.
A Life Saving Filtration System In Your Backpack
Everything you need for up to 1500 gallons of filtered water. Ready for when you need it most.
What's Inside the UK-S1
Click any component to learn more
Backwash Syringe
Filter Maintenance
Included syringe backflushes the filter core to clear trapped sediment and restore flow. A quick 30-second flush keeps the straw performing and extends its usable life.
0.1-Micron Filter Straw
The Heart of the System
The core of the UK-S1. A 0.1-micron hollow-fiber membrane removes 99.99% of bacteria, parasites, protozoa, and microplastics across four filtration stages. Sip directly from the source, screw it onto a bottle, or run it inline with the pouch.
Flexible Extension Hose
Extended Reach
Food-grade flexible hose lets you draw from shallow trickles, tight crevices, and hard-to-reach sources without struggling. Connects to the filter so you can fill bottles or drink at a distance.
Collapsible Squeeze Pouch
Water Collection
Fill the collapsible pouch from any freshwater source, screw on the filter, and squeeze for clean water on demand — no suction required. Rolls up flat when empty so it disappears into your pack.
Illustrated Instructions
Quick-Start Guide
Clear, illustrated instructions walk you and your family through setup, every drinking method, and filter care — so the system is ready to use the moment you need it, no guesswork.
Carabiner Clip
Grab-and-Go Ready
Heavy-duty clip attaches the UK-S1 to your pack, belt loop, or bug-out bag so it stays accessible and ready to grab the instant you need clean water.
How It Works
Fill From Any Source
Dip the 1-gallon reservoir into any freshwater source — a stream, lake, pond, or even collected rainwater. You don't need to find clean water first. That's the filter's job.
Hang It Up
Use the built-in strap to hang the reservoir from a tree branch, a hook, or your pack. Get it above where you'll be drinking from, so gravity has room to work.
Let Gravity Do the Work
Gravity pulls the water down through the 0.1-micron hollow-fiber filter — no pumping, no batteries, no waiting. Bacteria, parasites, and microplastics stay behind.
Drink Clean Water
Clean water flows out the tube, ready to drink straight or to fill your bottles and containers. Set it up once and let it run hands-free while you handle everything else.
EVERYTHING YOU NEED TO KNOW
Frequently Asked Questions
How does the UK-S1 work?
There's nothing to charge, pump, or power. Drink directly through the straw from any freshwater source, or fill the squeeze pouch, screw on the filter, and squeeze — water passes through the 0.1-micron hollow-fiber membrane and comes out clean. You can also thread it onto a standard water bottle or use the extension hose to fill your containers.
What does it filter out of the water?
The 0.1-micron hollow-fiber membrane is designed to remove waterborne bacteria, protozoa and parasites, microplastics, and sediment — to 99.99%. It's built for natural freshwater sources, not saltwater or water contaminated with chemicals, fuel, or heavy metals.
What water sources can I use it with?
Streams, rivers, lakes, ponds, and collected rainwater are all fair game. For the clearest results and longest filter life, fill from the cleanest water available and avoid heavy mud or silt. Steer clear of saltwater and any water you suspect contains chemicals or industrial runoff.
Does it need power, batteries, or chemicals?
None of the above. The UK-S1 works on simple suction or a gentle squeeze — no electricity, no batteries, no chemical tablets, and nothing to dissolve or wait on. That's exactly what makes it reliable when the grid is down.
How long does the filter last?
Up to 400 gallons of clean water over the life of the filter, depending on water quality and regular maintenance. Dirtier source water and skipped cleanings will shorten that, so backflushing after use keeps it flowing at its best.
How do I clean and maintain it?
When the flow slows, backflush the filter with clean water using the included syringe to clear trapped particles. Let the filter fully air-dry before long-term storage. That's the whole routine — no replacement parts needed between uses.
How do I store it — and can it freeze?
Store it clean and dry in your kit, vehicle, or bug-out bag. One important note: never let the filter freeze while it's wet — ice can damage the hollow-fiber membrane. Dry it completely before storing it anywhere it might freeze.
What's included in the box?
Each order includes the UK-S1 filter straw, a collapsible squeeze pouch, a flexible extension hose, the backwash syringe, a carabiner clip, and illustrated instructions.
What about shipping, returns, and warranty?
Processing time is one to two days, and you should allow five days for delivery. Questions? Reach us anytime at support@uksurvival.com.
A little slow but works well enough. Haven't had any ill effects from Colorado river water so it worked.
2 June 2026Really glad I bought this for my emergency kit.
1 June 2026Great product works just as described I will definitely be buying more filters and continue to use this system.
26 May 2026Needed an intermediate solution for clean water. The straws are great for short term but this is expected for longer excursions. Good quality material […]
21 May 2026Love the simplicity. The tubing gets kinda twisted as you screw on lids. The clean bag would be nice if it poured but the connection seems like a one […]
18 May 2026Get for backpacking with Scouts. It took about 10 minutes to filter about 6 liters or 6 Nalgene Bottles. I would recommend a ball valve to screw the f […]
11 May 2026Great system to have in your bugout gear. Water in necessary for survival and this will get you by.
11 May 2026I prefer and love gravity filters because its simply faster than the sucking ones you put on your water bottle, and i can share water with my friends. […]
7 May 2026I haven't used it yet, but it looks well-made.
5 May 2026High quality system! You need one for backup fresh water in an emergency.
4 May 2026Worked perfectly, no one is sick. I never realized how tasty filtered mountain water could be.
4 May 2026This arrived quickly and appears to be very compact and efficient, though I'm saving it for emergencies, since my well water is good and deep. This is […]
3 May 2026I haven't used it yet, but I think its just what I wanted.
1 May 2026It was what I expected it to be. I had bought an older version and hopefully this one is as good once we use it this summer for camping.
1 May 2026Loved this water bag!! Took it to Havasupai in 112 degree heat…yes, they have a water source but i filter for my own comfort - we filled the water b […]
28 April 2026Exactly what I need!
28 April 2026I don't know if that could be just me because it takes me back 60 years when I was a little kid and drank from hose that hung wrapped up on the outdoo […]
28 April 2026Great package for survival.
25 April 2026Replaces my homemade one from back before they were a thing and does a fantastic job of it.
19 April 2026