6L Gravity Water Filter System

Regular price $ 39.99

Starting at $13/mo with Shop Pay Installments.

Obtaining clean water on the trail is a breeze with our 6L Gravity Water Filter System! Simply fill the large BPA-free TPU water bladder and sit back while gravity does all the work. A standard 28mm filter thread means you can filter directly into most backpack bladders or water bottles. It's never been easier to filter water for you and your camp mates.

Only 422 items in stock!
Free Shipping on US Orders | Lifetime Warranty | 60-Day Returns and Exchanges

Product Description

Our 6-liter Gravity Water Filter System is the easiest and most convenient water filter system for your backpacking adventures. Who wants to cramp their fingers with squeeze filters or exert extra energy with hand pump filters when you can let gravity do all the work?! With our system, simply fill the large 6L reservoir and move on to other camp tasks.

The advanced Hollow Fiber Membrane with Activated Carbon filter effectively eliminates bacteria, protozoa, and sediments, guaranteeing a safe and reliable water supply wherever your adventures take you. The filter is rated for 5,000L, providing enough water for 900+ person-days on the trail.

Designed to accommodate group use, this filter system simplifies water filtration at camp. The large BPA-Free 6L reservoir means fewer trips to the water source, allowing you to find the optimal camp spot without regard to water access.

The 28mm thread on each end ensures compatibility with most water bottles and bladders, providing unparalleled versatility. Filter water directly into your bladder or Smartwater bottles. The included hose clamp makes it easy to stop the filter while you swap containers.

Compact and lightweight, this system is tailor-made for multi-day backpacking. The minimum system (bladder, tube, and filter) weighs only 7.9 ounces and can be split up between campmates, resulting in virtually no impact on your pack weight.

Upgrade your backpacking experience with the Gravity Water Filter System! Enjoy the ease and convenience of providing filtered water for your group with virtually no effort.

Specs and Sizing


  • Filter Type = UF Hollow Fiber Membrane with Activated Carbon
  • Filter Effectiveness = 99.9999% of bacteria and 99.99% of protozoa
  • Filter Life = 5,000L
  • Bladder = BPA Free TPU (Thermoplastic Polyurethane)


  • Total Shipped Weight = 10.3 ounces
  • Minimum Weight (filter, bladder, tube) = 7.9 ounces
  • Filter Only Weight = 1.9 ounces

Product Dimensions

  • Filter Size = 6.3 inches long, 1.2 inches in diameter
  • Total Packed Dimensions = 10 inches x 4 inches x 2 inches

Other Specifications

  • Flow Rate* = 750 ml per minute, about 10 minutes to filter full 6L bladder
  • Filter Thread Diameter = 28 mm (compatible with most bladders, Smart Water bottles, etc.)
  • Includes: Filter, 6L Bladder with Optional Strap, Connector Tubing with Clamp, 16 ounce Water Pouch, Mesh Storage Sack

* Flow rate will vary based on water quality and filter maintenance. Back-flushing is recommended every few days, or more frequently in areas with very poor water quality.

How do I backflush the filter?

To backflush the filter, use the included 16 ounce water pouch or a clean water container (like a Smartwater bottle). Fill the clean water container with clean water and connect to the output end. Disconnect any tube or containers from the input end. Then squeeze the clean water container to force clean water back through the filter and out the input end. This will flush any debris within the filter. Back-flushing is recommended every few days, or more frequently in areas with very poor water quality. 

How do I improve my filter flow rate?

Since the system relies on gravity to filter water, hang the 6L water bladder as high as you can above the water output container.

Also, make sure to purge air out of the hose. To do this, let a bit of water flow through the hose before clamping the hose and attaching the actual filter. This will ensure all air inside the hose is removed.

Finally, air can also get trapped within the filter and reduce the flow rate. If you're seeing slow flow rates, give the bladder a squeeze (with the top rolled closed) to push water into the filter and clear out any trapped air.

Can the filter be used on it's own, like a straw filter?

Yes, you can definitely use the filter like a straw. Simply connect the hose to the input end and submerge in the water source. You can then drink from the output end. To help with this, you might want to cut a short section of hose to attach to the output end. This will help make drinking easier and more comfortable.

Can the filter be used with squeeze bags, like the CNOC VECTO Bags?

Yes, the filter can be combined with 28mm thread bags on the input end to create a squeeze filter if needed.

How do I remove kinks from the hose?

The hose may arrive with kinks from being stored folded up. Simply run some hot water over the hose for 20-30 seconds to soften it and remove any kinks.

How do I store the system at home?

Let the filter and bladder dry completely before putting away. If you want to wash the bladder, use a mild soap and flush with clean water. Keep the system in a dry place in the included mesh storage sack.

We offer two shipping services within the United States:

  • Free Standard Shipping = 5-7 Day Ground Shipping
  • Expedited Shipping = 2-4 Day Express Shipping

Do you ship outside of the United States?

Yes, we ship to all of Canada, Australia, and New Zealand. We also ship to select European countries that include the following; UK, Germany, Denmark, the Netherlands, Switzerland, France, Sweden, Finland, Poland and Ireland.

All international orders are shipped via DHL Express with all Duties Paid. This means that all import taxes and duties are prepaid. No additional fees will be collected from the customer.

Most international deliveries are made within 4-6 business days, although more remote locations can take a couple of extra days. All international shipments are fully tracked from door-to-door.

If your destination is not listed above, we apologize that we're not able to accommodate direct shipments to you. However, some of our customers have successfully used 3rd party international parcel forwarding services.

What is your return/exchange policy?

We offer 60 days to accommodate any returns or exchanges of non-defective products. In some cases, we can accommodate returns and exchanges past 60 days, but these will be decided on a case-by-case basis. Any returns after 60 days will only be offered store credit.

What items are eligible for a return?

To be eligible for a return and refund, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

If you've purchased a tent or tarp and would like to set it up in your backyard, please do so on a dry, clear day to keep the tent/tarp as clean as possible. Pitch the tent/tarp on dry grass if possible and use other stakes if you have them available. This will keep the tent/tarp and stakes in an unused condition to facilitate a return.

If items sent back for a return/exchange show clear signs of use (excessive dirt, animal hair, etc.), the return/exchange will be rejected and the items will be shipped back.

Are shipping fees refundable?

Shipping costs are non-refundable. If you receive a refund, the initial cost of shipping your order (if any) will be deducted from your refund.

Is return shipping free?

No, the cost of return shipping will be subtracted from the refund amount. We will provide a prepaid return label for the return shipment. The cost of return shipping will be provided to you along with the prepaid return label. 

Please note that due to our shipping volume, we have access to significantly lower shipping rates than retail. As a result, the cost of the return shipping will be much lower, resulting in a higher refund.

How do I initiate a return/exchange?

To initiate a return/exchange, please email us at support@pariaoutdoorproducts.com with the following information:

  • Your original order number
  • The items to be returned/exchanged
  • The reason for the return/exchange

Once your return/exchange request is received, we will provide a prepaid return shipping label along with the cost of return shipping. If you decide to proceed with the return, please use this label to send the items back to us. We will only accept returns that are shipped via the prepaid return label. This ensures that the shipment will be trackable and insured.

Once the returned items are delivered and inspected (please allow 1-2 weekdays for inspection), we will issue your refund or exchange.

When a refund is processed, a credit will automatically be applied to your original method of payment and you will receive an email notification. Please allow 2-5 business days for the credit to appear.

What about international returns?

If you are an international customer, the same 60 day return/exchange policy applies. To initiate an international return, please contact us at the email address above and provide the same order/item to be returned information. We will then coordinate with you on the return process, which will differ slightly depending on your exact location. The return instructions above only apply to US customers.

All of our products come with a limited lifetime warranty against manufacturer defects. If there is a problem with your gear due to manufacturing, we will replace it free of charge, no questions asked. If you have any concerns about your product, please contact us at: support@pariaoutdoorproducts.com.

When contacting us for a warranty claim, please include:

  • The specific product, including size or length
  • Your original order number
  • Your current shipping address

We pride ourselves on our courteous and responsive customer service. We'll do our best to make sure all of our customers are happy with their purchase.

Customer Reviews

Based on 5 reviews
Luke Traeger (Denver, CO, US)
Super Fast Passive Filter!!

I've tried a number of different backpacking filters, both passive (gravity-fed) and active, such as a pump filter. Many passive filters slow down quite quickly and have to be flushed often. I took this filter for it's maiden voyage on a hut trip weekend with 17 people and it filtered water for half the weekend before needing one little flush, then continuing to filter. Excellent product at the right price point.

Paul Douckas (Leominster, MA, US)
6L gravity water filter system

I bought this to try out over small 1L bags which can take time to fill.
I love this system. It's easy to scoop up water from a brook ,river or lake .with one scoop you can snag 6L of water and go.
I like the straps to help carry to camp, it also helps to hang in a tree and fill as you need. The Paria water filter works fine as well ..I have always used sawyer. But I've filtered only maybe 19-20 liters so far but no issues. Back flush is simple.. easy to clean the bag when home.
I really recommend this product ..it's not only good ,it can be half the cost of other brands that you are basically paying for the name .

Doug Perry (Belton, MO, US)
gravity filter system

haven’t used it yet but I’m quite sure it’s going to work out well

JTisLivingTheDream (Duluth, GA, US)
Top quality gear.

Top quality gear for less. And an even better company. No hesitation.

MelAK (Fairbanks, AK, US)
Needs improvement

Just ok. Took a chance on this filter because of the price and I have other Paria products that are great. Used it on a 9 day float trip on cold, clear lakes and rivers in AK (virtually no silt and nutrient poor). Found that for every 6L filtered, we had to back flush the filter once or twice to keep water flowing at a reasonable pace which seems excessive compared to other similar filters I've used on other trips with poorer water quality. The strap attachment is also cheap and annoying to clip around a tree or branch when the bag is full. Otherwise, it was easy to use, and when it was working, did provide fine filtered water.

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