Gravity Water Filter Kit — 1 Gallon
Gravity Water Filter Kit — 1 Gallon
Your tap runs on power you never see. When it stops, this kit turns nearby water into drinking water.
- Removes 99.99% of bacteria, parasites and microplastics
- A full gallon per fill: water for the family, not one sip
- Works with no power. Hang it and gravity does the rest
- Stores flat for years in a drawer or a car trunk
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How to use it
Fill the bag from a tap, a rain barrel or a creek. Hang it on a door, a branch or a shower rod. Open the valve and let gravity work: a full gallon, hands-free. When the flow slows down, rinse the filter backward with clean water.
What is in the kit
4 parts: 1-gallon gravity bag, 0.1-micron filter core, hose with shut-off valve, hang loop. Everything fits together out of the box.
Shipping
Free shipping on every order. Orders ship in 1 to 3 business days. Delivery takes 5 to 8 business days. A tracking link is emailed as soon as your kit leaves.
90-day guarantee
Try it at home for 90 days. If it is not for you, write to support@hartenwell.com and send it back for a refund.
It does not take a disaster. It takes a bad afternoon.
A 45-minute power failure at the water plant put about 500,000 people under a boil-water order.
People under boil-water notices at the peak of the freeze. Many had no power to boil anything.
Before tap water was declared safe to drink again after Hurricane Helene.
Your tap runs on electricity you never see.
Treatment plants and pump stations need power to push water to your faucet. When they stop, pressure drops and the water can no longer be trusted.
This kit needs none of it. No outlet, no battery, no pumping. Only gravity.
Three steps. That is the whole manual.
- Fill it from a tap, a rain barrel, a creek or a pond.
- Hang it on a door, a branch or a shower rod.
- Drink. A full gallon, filtered on its own, while you do something else.
The kit, part by part
Four parts, one box. Everything fits together the first time. Tap a part to see what it does.
1. Gravity bag
Holds one gallon (3.8 L) of source water. Roll the top, clip it shut, hang it. The wide opening fills from a tap, a rain barrel or a creek without a funnel.
2. Filter core
A 0.1-micron hollow-fiber membrane. Water passes through thousands of tiny tubes; bacteria, parasites and microplastics are too large to follow. Removes 99.99% of each.
3. Hose
Carries water from the bag down to the filter. The longer the drop, the faster the flow. A shut-off valve stops it when your container is full.
4. Hang loop
A strap and clip that hold the full bag on a branch, a door handle, a shower rod or a car door.
What it removes. And what it does not.
Removes
- Bacteria such as E. coli: 99.99%
- Parasites such as Giardia: 99.99%
- Microplastics: 99.99%
- Sediment, rust, cloudiness
Does not remove
- Chemicals, fuel, pesticides
- Heavy metals such as lead
- Salt: never use seawater
Your options when the tap cannot be trusted
Bottled water
- Works without power
- Gone by day 5
- Enough only if you stored it
- Takes a closet
Boiling
- Needs a working stove
- Lasts while the fuel lasts
- Slow, one pot at a time
- No storage needed
Filter straw
- Works without power
- Still there on day 5
- One sip, one person
- Fits in a pocket
This kit
- Works without power
- Still there on day 5
- A gallon at a time, for the family
- Fits in a drawer
Built for a household, not for one hiker.
One fill gives a full gallon: drinking water, cooking water, baby bottles. Refill it as many times as you need.
It stores flat in a kitchen drawer or a car trunk and is ready for years.
DAYS
Try it at home for 90 days.
Fill it from your own tap, hang it, taste the water. If it is not for you, send it back for a refund.
Questions people ask before buying
Does it remove viruses?
No. The 0.1-micron membrane stops bacteria and parasites. For water that may carry viruses, filter first, then disinfect.
Can I use it during a boil-water notice?
It filters the bacteria and parasites that boil notices are usually issued for. Always follow your local authority's instructions.
What about chemicals or lead?
This is a physical filter. It does not remove chemicals, fuel, pesticides, heavy metals or salt. Use it on fresh water: tap, rain, creek, lake, pond.
How long does the filter last?
Rinse the core backward with clean water when the flow slows down. Replace the core when rinsing no longer restores the flow.
Can it freeze?
Never let the filter freeze while it is wet: ice can damage the membrane. Dry it fully before storing it in a cold place.
Why not a $25 filter straw?
A straw gives one person one sip at a time. This kit fills bottles and pots for the whole household while you do something else.
How fast does it ship?
Orders ship in 1 to 3 business days and arrive in 5 to 8 business days, with tracking. Shipping is free..