Why is there always some water left in the tank that doesn’t get filtered?

This 'rejected water' is essential to RO systems—it carries away concentrated impurities (salts, heavy metals, etc.) blocked by the filter membrane

What’s the difference between Y9A and Y9T?

Y9A adds minerals to create smooth-tasting alkaline water ideal for daily drinking.

Y9T removes all minerals to achieve near-zero TDS water, preventing scale in appliances like coffee makers.

Why does the purified water still have TDS (Total Dissolved Solids)? Shouldn’t it be zero?

Non-zero TDS ≠ malfunction：Y9T reduces TDS to near-zero via unique filtration technology; Y9A will boosts TDS (10-30ppm) by remineralization for alkaline water, while and mineral content. (Final TDS depends on feed water quality)

How often do filters need replacement?

Filter replacement depends on your water quality and daily usage. Here's a practical guide based on real-world conditions:

**PPC-Filter:** Every 6 months

**Main RO Filter:** Every 9 months

**Alkaline Mineral Filter:** Every 6 months

Can this Y9 Series filter remove fluoride or heavy metal?

Yes, absolutely! removes up to 99.89% of fluoride, verified by SGS lab testing.

And our SimPure Y9A effectively removes heavy metals(Pb/Hg/As/Cu). For detailed test data, please refer to the SGS report.