How to Replace a Small Filter Check Valve

Quick answer

To replace a small filter check valve, disassemble your MSR water filter, remove the old valve, install the new Small Filter Check Valve, and reassemble carefully.

Step-by-step replacement

1. Gather tools and parts: You will need the new Small Filter Check Valve, a clean workspace, and possibly a small wrench or pliers. Make sure you have the correct replacement part for your specific MSR filter model. Check that the replacement valve matches your filter model before starting.
2. Disassemble the filter: Carefully take apart the filter according to the manufacturer's instructions. This usually involves unscrewing the filter housing or removing the end caps. Keep track of all small parts and O-rings. Lay out parts in order to avoid losing them or reassembling incorrectly.
3. Remove the old check valve: Locate the old check valve inside the filter. Gently pry or pull it out, being careful not to damage the surrounding housing. Inspect the area for debris or wear. If the old valve is stuck, do not force it—check for a retaining clip or screw.
4. Install the new check valve: Insert the new Small Filter Check Valve in the correct orientation. The arrow or flow direction indicator should point toward the outlet. Press it firmly into place until it seats securely. Double-check the flow direction before reassembling—a backwards valve will block water flow.
5. Reassemble and test: Put the filter back together, ensuring all seals and O-rings are properly seated. Run clean water through the filter to test for leaks and confirm normal flow. If water leaks or flow is still poor, disassemble and recheck the valve orientation and seals.

Replacement part spotlight

• Small Filter Check Valve: This Small Filter Check Valve is a replacement part designed for MSR water filters. It helps maintain proper function by controlling flow direction within the filter system.