How long does it take to filter one bag of water?

Ultra fast! it purified water flow of 700ml (23 oz.) per minute.

how long does it take to filter water?

in kitchen sink testing with a brand new unit on a full charge, it took 7 minutes to filter 1 gallon of water.

How many gallons does it filter?

I believe the insert or the description says up to 1000 gallons.

in a pinch, could a Sawyer filter be substituted for the pre-filter on the unit?

Thanks for your interesting, If the Sawyer could fit into the pre-filter hose, I think it would be universal in a pinch. There are size of hose restrictions, the inner diameter of the intake and outlet hoses is 6mm.

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Description

💧 Stay hydrated, stay unstoppable—purify your adventure with BK-2000!

RAPID FLOW RATE - Get 700ml of purified water per minute—stay hydrated without the wait.
ALL DAY POWER SUPPLY - Rechargeable battery purifies up to 16.8L per charge, supporting 10-15 days of group adventures.
HANDS FREE HYDRATION - One-button operation lets you filter water while setting up camp or hiking—multitasking made easy.
VERSATILE TRAVEL READY - Lightweight 350g design with multi-power options and emergency lighting for any outdoor scenario.
6 STAGE ULTRA PURE FILTRATION - Advanced ultrafiltration membrane + activated carbon for crisp, clean water anywhere.

The BK-2000 is a cutting-edge portable water purifier featuring a 6-stage filtration system with a 0.01 micron ultrafiltration membrane and activated carbon for superior water taste and safety. Weighing just 350g, it offers a rapid 700ml/min flow rate and a rechargeable lithium battery capable of filtering up to 16.8L per charge, perfect for extended outdoor trips. Certified by SGS, FDA, FCC, and UL, it includes emergency lighting and versatile power options, making it an essential survival tool for camping, hiking, and travel.