What are you looking for?

Choosing the Right Grayl

• Should I buy an Ultrapress or a Geopress?
• Isn't tap water good enough?
• Can you use Grayl for tap water?

What Grayl Filters Out

• What does the Grayl filter out?
• Can I use the purifier cartridge to filter liquids other than water?
• Is the filtered & purified water from Grayl safe for drinking in the developing world?
• Does the Grayl filter microplastics?
• Does Grayl filter out chlorine?
• Is the purifier cartridge effective against cyanotoxins (a.k.a. blue algae)?
• What is activated carbon?
• What is the pore size (microns) of the purifier cartridge?
• View all articles in “What Grayl Filters Out”

How to Use Your Grayl

• How do I filter water with a Grayl?
• Why do you recommend "pressing" either on the ground or below knee level?
• How do I separate the inner press from the outer [re]fill?
• How do I remove and/or install a filter?

Care & Maintenance

• Why does my Grayl Leak?
• Should I wash my Grayl before use?
• Can you put Grayl in the dishwasher?
• Can I put any Grayl components in a microwave or freezer?
• What happens if my Grayl freezes?

Cartridge Lifespan and Replacement

• What is the lifespan of Grayl?
• What is the shelf life of my purifier cartridge?
• When should I replace my Grayl filter?
• Are all Grayl components BPA-free?
• I have an older Ultralight Bottle, what replacement filter can I use?

Warranty & Returns

• Does Grayl have a warranty?
• What is Grayl's return policy?

Guides & Manuals

• Where are the guides or manuals?

Usage Safety

• Can I use my Grayl to filter boiling water?

Shipping

• When will my order ship?