Therm-a-Rest® - Sleeping Pads, Bags & Outdoor Comfort

AutoFlow™ Replacement Dirty Reservoir

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$25.17 $41.95 In stock

Category: Replacement & Repair Parts

Keep your gravity water filter system ready for the trail with the MSR AutoFlow Replacement Dirty Reservoir. Designed as a direct replacement for the 10-liter dirty water reservoir used with AutoFlow, Trail Base, or Guardian Gravity Purifier systems, this part helps restore your setup to full function.

  • 10-liter capacity for gravity-fed water filtration tasks
  • Compatible with AutoFlow, Trail Base, and Guardian Gravity Purifier systems
  • Replacement part for maintaining your existing filter setup
  • From MSR, a trusted name in outdoor gear
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Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Ellie M. ★★★★★

The 10-liter size is exactly what my gravity setup needed, and the fittings snapped onto my existing hose without any leaks. Filled it twice on a three-day trip and the seams held up fine.

Timothy ★★★★★

Took this on a four-day trip and the 10-liter capacity was perfect for refilling at a single stream instead of hunting for water twice a day. The connection to my filter screwed on tight with no drips, which is more than I can say for the generic one I tried before.

Michael ★★★★★

My old dirty reservoir got a pinhole leak after two seasons, so this replacement was a relief to find. It's a straight swap for the 10-liter bag on my gravity setup, and the connections sealed up tight on the first try. Backpacking trips are back on.

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