How to Replace the UltraPress Inner Press: Step-by-Step
By Best Water Filter and Purifier Bottles. Clean water anywhere on earth. -... | Published: 2026-10-23
Category: How-to Guides
Learn how to replace the UltraPress Inner Press in a few simple steps. Keep your water purifier working reliably for every adventure.
Quick answer
Replacing the UltraPress Inner Press takes about two minutes and requires no tools. The key is to align the press correctly before pushing it into the bottle.
Why replace the Inner Press?
The Inner Press is the component that creates the pressure needed to push water through the purifier cartridge. Over time, the rubber seal can wear or the plastic body can become brittle, especially after repeated use in cold conditions. A worn Inner Press makes it harder to achieve a good seal, which reduces filtration efficiency and can lead to leaks.
When to swap it out
Replace the Inner Press if you notice water bypassing the plunger, if the press feels loose when inserted, or if the rubber seal shows cracks or deformation. As a rule of thumb, consider replacing it every 12–18 months with regular use. The GRAYL UltraPress Replacement Inner Press is the only compatible part for UltraPress bottles.
Step-by-step replacement
- Remove the old Inner Press: Unscrew the bottle cap and pull the old Inner Press straight out. If it's stuck, twist it gently while pulling. Do not use pliers or tools—they can damage the bottle threads. Inspect the old press for cracks or flattened seals before discarding it.
- Check the bottle and cartridge: Look inside the bottle opening for debris or mineral buildup. Wipe the sealing surface with a clean cloth. Also confirm that the purifier cartridge is seated firmly in the bottle base. A dirty sealing surface is the most common cause of leaks after replacement.
- Insert the new Inner Press: Align the new Inner Press so the flat side of the rubber seal faces downward (toward the water). Push it straight into the bottle until the seal sits flush against the rim. You should feel a slight resistance as the seal compresses. If the press does not go in easily, remove it and realign—forcing it can tear the seal.
- Test the seal: Fill the bottle with water, close the cap, and press down firmly. Water should flow through the spout without leaking around the press or the cap. If you see leaks, remove the press and reinstall it, making sure the seal is fully seated. A successful test means your purifier is ready for the trail again.
What you need
- UltraPress® Replacement Inner Press: The GRAYL UltraPress Replacement Inner Press is compatible exclusively with UltraPress Bottles and ensures continued performance of your filtration system. Using the correct replacement part guarantees a proper seal and maintains the purification integrity that GRAYL designed for.
UltraPress® Replacement Inner Press
