Question 1

Which is better, Waterdrop G3P800 or Express Water ROALK5D?

Accepted Answer

Based on our testing, the Waterdrop G3P800 scores higher overall at 9.1/10. The Waterdrop G3P800 scored 9.1/10 and the Express Water ROALK5D scored 8.4/10 in our Best Reverse Osmosis Water Filters 2026 evaluation.

Question 2

Is the Waterdrop G3P800 worth it over the Express Water ROALK5D?

Accepted Answer

The Waterdrop G3P800 scores 9.1/10 while the Express Water ROALK5D scores 8.4/10. The Waterdrop G3P800 is our "Best Overall" pick in the Best Reverse Osmosis Water Filters 2026 category.

Waterdrop G3P800 vs Express Water ROALK5D: Which to Buy?